diff --git a/pylib/anki/collection.py b/pylib/anki/collection.py
index f06bd038d..bd5795024 100644
--- a/pylib/anki/collection.py
+++ b/pylib/anki/collection.py
@@ -657,6 +657,7 @@ where c.nid = n.id and c.id in %s group by nid"""
         self._startTime = time.time()
         self._startReps = self.sched.reps
 
+    # FIXME: Use Literal[False] when on Python 3.8
     def timeboxReached(self) -> Union[bool, Tuple[Any, int]]:
         "Return (elapsedTime, reps) if timebox reached, or False."
         if not self.conf["timeLim"]:
diff --git a/qt/aqt/reviewer.py b/qt/aqt/reviewer.py
index 316c33803..b02b96ab5 100644
--- a/qt/aqt/reviewer.py
+++ b/qt/aqt/reviewer.py
@@ -6,11 +6,12 @@ from __future__ import annotations
 
 import difflib
 import html
-import html.parser
 import json
 import re
 import unicodedata as ucd
-from typing import List, Optional
+from typing import Callable, List, Optional, Sequence, Tuple, Union
+
+from PyQt5.QtCore import Qt
 
 from anki import hooks
 from anki.cards import Card
@@ -25,7 +26,7 @@ from aqt.utils import askUserDialog, downArrow, qtMenuShortcutWorkaround, toolti
 
 
 class ReviewerBottomBar:
-    def __init__(self, reviewer: Reviewer):
+    def __init__(self, reviewer: Reviewer) -> None:
         self.reviewer = reviewer
 
 
@@ -39,28 +40,29 @@ class Reviewer:
         self.cardQueue: List[Card] = []
         self.hadCardQueue = False
         self._answeredIds: List[int] = []
-        self._recordedAudio = None
-        self.typeCorrect = None  # web init happens before this is set
+        self._recordedAudio: Optional[str] = None
+        self.typeCorrect: str = None  # web init happens before this is set
         self.state: Optional[str] = None
         self.bottom = BottomBar(mw, mw.bottomWeb)
         hooks.card_did_leech.append(self.onLeech)
 
-    def show(self):
+    def show(self) -> None:
         self.mw.col.reset()
-        self.mw.setStateShortcuts(self._shortcutKeys())
+        self.mw.setStateShortcuts(self._shortcutKeys())  # type: ignore
         self.web.set_bridge_command(self._linkHandler, self)
         self.bottom.web.set_bridge_command(self._linkHandler, ReviewerBottomBar(self))
-        self._reps = None
+        self._reps: int = None
         self.nextCard()
 
-    def lastCard(self):
+    def lastCard(self) -> Optional[Card]:
         if self._answeredIds:
             if not self.card or self._answeredIds[-1] != self.card.id:
                 try:
                     return self.mw.col.getCard(self._answeredIds[-1])
                 except TypeError:
                     # id was deleted
-                    return
+                    return None
+        return None
 
     def cleanup(self) -> None:
         gui_hooks.reviewer_will_end()
@@ -68,9 +70,10 @@ class Reviewer:
     # Fetching a card
     ##########################################################################
 
-    def nextCard(self):
+    def nextCard(self) -> None:
         elapsed = self.mw.col.timeboxReached()
         if elapsed:
+            assert not isinstance(elapsed, bool)
             part1 = (
                 ngettext("%d card studied in", "%d cards studied in", elapsed[1])
                 % elapsed[1]
@@ -125,7 +128,7 @@ class Reviewer:
     # Initializing the webview
     ##########################################################################
 
-    def revHtml(self):
+    def revHtml(self) -> str:
         extra = self.mw.col.conf.get("reviewExtra", "")
         fade = ""
         if self.mw.pm.glMode() == "software":
@@ -140,7 +143,7 @@ class Reviewer:
             fade, extra
         )
 
-    def _initWeb(self):
+    def _initWeb(self) -> None:
         self._reps = 0
         # main window
         self.web.stdHtml(
@@ -167,13 +170,13 @@ class Reviewer:
     # Showing the question
     ##########################################################################
 
-    def _mungeQA(self, buf):
+    def _mungeQA(self, buf: str) -> str:
         return self.typeAnsFilter(self.mw.prepare_card_text_for_display(buf))
 
     def _showQuestion(self) -> None:
         self._reps += 1
         self.state = "question"
-        self.typedAnswer = None
+        self.typedAnswer: str = None
         c = self.card
         # grab the question and play audio
         if c.isEmpty():
@@ -206,17 +209,17 @@ The front of this card is empty. Please run Tools>Empty Cards."""
         # user hook
         gui_hooks.reviewer_did_show_question(c)
 
-    def autoplay(self, card):
+    def autoplay(self, card: Card) -> bool:
         return self.mw.col.decks.confForDid(card.odid or card.did)["autoplay"]
 
     def _replayq(self, card, previewer=None):
         s = previewer if previewer else self
         return s.mw.col.decks.confForDid(s.card.odid or s.card.did).get("replayq", True)
 
-    def _drawFlag(self):
+    def _drawFlag(self) -> None:
         self.web.eval("_drawFlag(%s);" % self.card.userFlag())
 
-    def _drawMark(self):
+    def _drawMark(self) -> None:
         self.web.eval("_drawMark(%s);" % json.dumps(self.card.note().hasTag("marked")))
 
     # Showing the answer
@@ -246,7 +249,7 @@ The front of this card is empty. Please run Tools>Empty Cards."""
     # Answering a card
     ############################################################
 
-    def _answerCard(self, ease):
+    def _answerCard(self, ease: int) -> None:
         "Reschedule card and show next."
         if self.mw.state != "review":
             # showing resetRequired screen; ignore key
@@ -269,7 +272,9 @@ The front of this card is empty. Please run Tools>Empty Cards."""
     # Handlers
     ############################################################
 
-    def _shortcutKeys(self):
+    def _shortcutKeys(
+        self,
+    ) -> List[Union[Tuple[str, Callable], Tuple[Qt.Key, Callable]]]:
         return [
             ("e", self.mw.onEditCurrent),
             (" ", self.onEnterKey),
@@ -299,18 +304,18 @@ The front of this card is empty. Please run Tools>Empty Cards."""
             ("7", self.on_seek_forward),
         ]
 
-    def on_pause_audio(self):
+    def on_pause_audio(self) -> None:
         av_player.toggle_pause()
 
     seek_secs = 5
 
-    def on_seek_backward(self):
+    def on_seek_backward(self) -> None:
         av_player.seek_relative(-self.seek_secs)
 
-    def on_seek_forward(self):
+    def on_seek_forward(self) -> None:
         av_player.seek_relative(self.seek_secs)
 
-    def onEnterKey(self):
+    def onEnterKey(self) -> None:
         if self.state == "question":
             self._getTypedAnswer()
         elif self.state == "answer":
@@ -318,14 +323,14 @@ The front of this card is empty. Please run Tools>Empty Cards."""
                 "selectedAnswerButton()", self._onAnswerButton
             )
 
-    def _onAnswerButton(self, val):
+    def _onAnswerButton(self, val: str) -> None:
         # button selected?
         if val and val in "1234":
             self._answerCard(int(val))
         else:
             self._answerCard(self._defaultEase())
 
-    def _linkHandler(self, url):
+    def _linkHandler(self, url: str) -> None:
         if url == "ans":
             self._getTypedAnswer()
         elif url.startswith("ease"):
@@ -344,13 +349,13 @@ The front of this card is empty. Please run Tools>Empty Cards."""
 
     typeAnsPat = r"\[\[type:(.+?)\]\]"
 
-    def typeAnsFilter(self, buf):
+    def typeAnsFilter(self, buf: str) -> str:
         if self.state == "question":
             return self.typeAnsQuestionFilter(buf)
         else:
             return self.typeAnsAnswerFilter(buf)
 
-    def typeAnsQuestionFilter(self, buf):
+    def typeAnsQuestionFilter(self, buf: str) -> str:
         self.typeCorrect = None
         clozeIdx = None
         m = re.search(self.typeAnsPat, buf)
@@ -397,20 +402,19 @@ Please run Tools>Empty Cards"""
             buf,
         )
 
-    def typeAnsAnswerFilter(self, buf):
+    def typeAnsAnswerFilter(self, buf: str) -> str:
         if not self.typeCorrect:
             return re.sub(self.typeAnsPat, "", buf)
         origSize = len(buf)
         buf = buf.replace("<hr id=answer>", "")
         hadHR = len(buf) != origSize
         # munge correct value
-        parser = html.parser.HTMLParser()
         cor = self.mw.col.media.strip(self.typeCorrect)
         cor = re.sub("(\n|<br ?/?>|</?div>)+", " ", cor)
         cor = stripHTML(cor)
         # ensure we don't chomp multiple whitespace
         cor = cor.replace(" ", "&nbsp;")
-        cor = parser.unescape(cor)
+        cor = html.unescape(cor)
         cor = cor.replace("\xa0", " ")
         cor = cor.strip()
         given = self.typedAnswer
@@ -434,7 +438,7 @@ Please run Tools>Empty Cards"""
 
         return re.sub(self.typeAnsPat, repl, buf)
 
-    def _contentForCloze(self, txt, idx):
+    def _contentForCloze(self, txt: str, idx) -> str:
         matches = re.findall(r"\{\{c%s::(.+?)\}\}" % idx, txt, re.DOTALL)
         if not matches:
             return None
@@ -452,24 +456,28 @@ Please run Tools>Empty Cards"""
             txt = ", ".join(matches)
         return txt
 
-    def tokenizeComparison(self, given, correct):
+    def tokenizeComparison(
+        self, given: str, correct: str
+    ) -> Tuple[List[Tuple[bool, str]], List[Tuple[bool, str]]]:
         # compare in NFC form so accents appear correct
         given = ucd.normalize("NFC", given)
         correct = ucd.normalize("NFC", correct)
         s = difflib.SequenceMatcher(None, given, correct, autojunk=False)
-        givenElems = []
-        correctElems = []
+        givenElems: List[Tuple[bool, str]] = []
+        correctElems: List[Tuple[bool, str]] = []
         givenPoint = 0
         correctPoint = 0
         offby = 0
 
-        def logBad(old, new, str, array):
+        def logBad(old: int, new: int, s: str, array: List[Tuple[bool, str]]) -> None:
             if old != new:
-                array.append((False, str[old:new]))
+                array.append((False, s[old:new]))
 
-        def logGood(start, cnt, str, array):
+        def logGood(
+            start: int, cnt: int, s: str, array: List[Tuple[bool, str]]
+        ) -> None:
             if cnt:
-                array.append((True, str[start : start + cnt]))
+                array.append((True, s[start : start + cnt]))
 
         for x, y, cnt in s.get_matching_blocks():
             # if anything was missed in correct, pad given
@@ -486,17 +494,17 @@ Please run Tools>Empty Cards"""
             logGood(y, cnt, correct, correctElems)
         return givenElems, correctElems
 
-    def correct(self, given, correct, showBad=True):
+    def correct(self, given: str, correct: str, showBad: bool = True) -> str:
         "Diff-corrects the typed-in answer."
         givenElems, correctElems = self.tokenizeComparison(given, correct)
 
-        def good(s):
+        def good(s: str) -> str:
             return "<span class=typeGood>" + html.escape(s) + "</span>"
 
-        def bad(s):
+        def bad(s: str) -> str:
             return "<span class=typeBad>" + html.escape(s) + "</span>"
 
-        def missed(s):
+        def missed(s: str) -> str:
             return "<span class=typeMissed>" + html.escape(s) + "</span>"
 
         if given == correct:
@@ -519,24 +527,24 @@ Please run Tools>Empty Cards"""
         res = "<div><code id=typeans>" + res + "</code></div>"
         return res
 
-    def _noLoneMarks(self, s):
+    def _noLoneMarks(self, s: str) -> str:
         # ensure a combining character at the start does not join to
         # previous text
         if s and ucd.category(s[0]).startswith("M"):
             return "\xa0" + s
         return s
 
-    def _getTypedAnswer(self):
+    def _getTypedAnswer(self) -> None:
         self.web.evalWithCallback("typeans ? typeans.value : null", self._onTypedAnswer)
 
-    def _onTypedAnswer(self, val):
+    def _onTypedAnswer(self, val: None) -> None:
         self.typedAnswer = val or ""
         self._showAnswer()
 
     # Bottom bar
     ##########################################################################
 
-    def _bottomHTML(self):
+    def _bottomHTML(self) -> str:
         return """
 <center id=outer>
 <table id=innertable width=100%% cellspacing=0 cellpadding=0>
@@ -565,7 +573,7 @@ time = %(time)d;
             time=self.card.timeTaken() // 1000,
         )
 
-    def _showAnswerButton(self):
+    def _showAnswerButton(self) -> None:
         if not self.typeCorrect:
             self.bottom.web.setFocus()
         middle = """
@@ -587,17 +595,17 @@ time = %(time)d;
         self.bottom.web.eval("showQuestion(%s,%d);" % (json.dumps(middle), maxTime))
         self.bottom.web.adjustHeightToFit()
 
-    def _showEaseButtons(self):
+    def _showEaseButtons(self) -> None:
         self.bottom.web.setFocus()
         middle = self._answerButtons()
         self.bottom.web.eval("showAnswer(%s);" % json.dumps(middle))
 
-    def _remaining(self):
+    def _remaining(self) -> str:
         if not self.mw.col.conf["dueCounts"]:
             return ""
         if self.hadCardQueue:
             # if it's come from the undo queue, don't count it separately
-            counts = list(self.mw.col.sched.counts())
+            counts: List[Union[int, str]] = list(self.mw.col.sched.counts())
         else:
             counts = list(self.mw.col.sched.counts(self.card))
         idx = self.mw.col.sched.countIdx(self.card)
@@ -608,13 +616,13 @@ time = %(time)d;
         ctxt += space + "<span class=review-count>%s</span>" % counts[2]
         return ctxt
 
-    def _defaultEase(self):
+    def _defaultEase(self) -> int:
         if self.mw.col.sched.answerButtons(self.card) == 4:
             return 3
         else:
             return 2
 
-    def _answerButtonList(self):
+    def _answerButtonList(self) -> Sequence[Tuple[int, str]]:
         l = ((1, _("Again")),)
         cnt = self.mw.col.sched.answerButtons(self.card)
         if cnt == 2:
@@ -624,7 +632,7 @@ time = %(time)d;
         else:
             return l + ((2, _("Hard")), (3, _("Good")), (4, _("Easy")))
 
-    def _answerButtons(self):
+    def _answerButtons(self) -> str:
         default = self._defaultEase()
 
         def but(i, label):
@@ -652,7 +660,7 @@ time = %(time)d;
 <script>$(function () { $("#defease").focus(); });</script>"""
         return buf + script
 
-    def _buttonTime(self, i):
+    def _buttonTime(self, i: int) -> str:
         if not self.mw.col.conf["estTimes"]:
             return "<div class=spacer></div>"
         txt = self.mw.col.sched.nextIvlStr(self.card, i, True) or "&nbsp;"
@@ -661,7 +669,7 @@ time = %(time)d;
     # Leeches
     ##########################################################################
 
-    def onLeech(self, card):
+    def onLeech(self, card: Card) -> None:
         # for now
         s = _("Card was a leech.")
         if card.queue < 0:
@@ -730,7 +738,7 @@ time = %(time)d;
         qtMenuShortcutWorkaround(m)
         m.exec_(QCursor.pos())
 
-    def _addMenuItems(self, m, rows):
+    def _addMenuItems(self, m, rows) -> None:
         for row in rows:
             if not row:
                 m.addSeparator()
@@ -753,10 +761,10 @@ time = %(time)d;
                 a.setChecked(True)
             a.triggered.connect(func)
 
-    def onOptions(self):
+    def onOptions(self) -> None:
         self.mw.onDeckConf(self.mw.col.decks.get(self.card.odid or self.card.did))
 
-    def setFlag(self, flag):
+    def setFlag(self, flag: int) -> None:
         # need to toggle off?
         if self.card.userFlag() == flag:
             flag = 0
@@ -764,7 +772,7 @@ time = %(time)d;
         self.card.flush()
         self._drawFlag()
 
-    def onMark(self):
+    def onMark(self) -> None:
         f = self.card.note()
         if f.hasTag("marked"):
             f.delTag("marked")
@@ -773,19 +781,19 @@ time = %(time)d;
         f.flush()
         self._drawMark()
 
-    def onSuspend(self):
+    def onSuspend(self) -> None:
         self.mw.checkpoint(_("Suspend"))
         self.mw.col.sched.suspendCards([c.id for c in self.card.note().cards()])
         tooltip(_("Note suspended."))
         self.mw.reset()
 
-    def onSuspendCard(self):
+    def onSuspendCard(self) -> None:
         self.mw.checkpoint(_("Suspend"))
         self.mw.col.sched.suspendCards([self.card.id])
         tooltip(_("Card suspended."))
         self.mw.reset()
 
-    def onDelete(self):
+    def onDelete(self) -> None:
         # need to check state because the shortcut is global to the main
         # window
         if self.mw.state != "review" or not self.card:
@@ -801,23 +809,24 @@ time = %(time)d;
             % cnt
         )
 
-    def onBuryCard(self):
+    def onBuryCard(self) -> None:
         self.mw.checkpoint(_("Bury"))
         self.mw.col.sched.buryCards([self.card.id])
         self.mw.reset()
         tooltip(_("Card buried."))
 
-    def onBuryNote(self):
+    def onBuryNote(self) -> None:
         self.mw.checkpoint(_("Bury"))
         self.mw.col.sched.buryNote(self.card.nid)
         self.mw.reset()
         tooltip(_("Note buried."))
 
-    def onRecordVoice(self):
+    def onRecordVoice(self) -> None:
         self._recordedAudio = getAudio(self.mw, encode=False)
         self.onReplayRecorded()
 
-    def onReplayRecorded(self):
+    def onReplayRecorded(self) -> None:
         if not self._recordedAudio:
-            return tooltip(_("You haven't recorded your voice yet."))
+            tooltip(_("You haven't recorded your voice yet."))
+            return
         av_player.play_file(self._recordedAudio)
diff --git a/qt/aqt/sound.py b/qt/aqt/sound.py
index 16611950c..12d3e8214 100644
--- a/qt/aqt/sound.py
+++ b/qt/aqt/sound.py
@@ -87,7 +87,7 @@ class AVPlayer:
     # audio be stopped?
     interrupt_current_audio = True
 
-    def __init__(self):
+    def __init__(self) -> None:
         self._enqueued: List[AVTag] = []
         self.current_player: Optional[Player] = None
 
@@ -112,7 +112,7 @@ class AVPlayer:
         self._enqueued.insert(0, SoundOrVideoTag(filename=filename))
         self._play_next_if_idle()
 
-    def toggle_pause(self):
+    def toggle_pause(self) -> None:
         if self.current_player:
             self.current_player.toggle_pause()
 
@@ -179,7 +179,7 @@ av_player = AVPlayer()
 
 # return modified command array that points to bundled command, and return
 # required environment
-def _packagedCmd(cmd) -> Tuple[Any, Dict[str, str]]:
+def _packagedCmd(cmd: List[str]) -> Tuple[Any, Dict[str, str]]:
     cmd = cmd[:]
     env = os.environ.copy()
     if "LD_LIBRARY_PATH" in env:
@@ -205,7 +205,7 @@ def _packagedCmd(cmd) -> Tuple[Any, Dict[str, str]]:
 si = startup_info()
 
 # osx throws interrupted system call errors frequently
-def retryWait(proc) -> Any:
+def retryWait(proc: subprocess.Popen) -> int:
     while 1:
         try:
             return proc.wait()
@@ -227,7 +227,7 @@ class SimpleProcessPlayer(Player):  # pylint: disable=abstract-method
     args: List[str] = []
     env: Optional[Dict[str, str]] = None
 
-    def __init__(self, taskman: TaskManager):
+    def __init__(self, taskman: TaskManager) -> None:
         self._taskman = taskman
         self._terminate_flag = False
         self._process: Optional[subprocess.Popen] = None
@@ -238,7 +238,7 @@ class SimpleProcessPlayer(Player):  # pylint: disable=abstract-method
             lambda: self._play(tag), lambda res: self._on_done(res, on_done)
         )
 
-    def stop(self):
+    def stop(self) -> None:
         self._terminate_flag = True
         # block until stopped
         t = time.time()
@@ -252,7 +252,7 @@ class SimpleProcessPlayer(Player):  # pylint: disable=abstract-method
         )
         self._wait_for_termination(tag)
 
-    def _wait_for_termination(self, tag: AVTag):
+    def _wait_for_termination(self, tag: AVTag) -> None:
         self._taskman.run_on_main(
             lambda: gui_hooks.av_player_did_begin_playing(self, tag)
         )
@@ -359,7 +359,7 @@ class MpvManager(MPV, SoundOrVideoPlayer):
     def toggle_pause(self) -> None:
         self.set_property("pause", not self.get_property("pause"))
 
-    def seek_relative(self, secs) -> None:
+    def seek_relative(self, secs: int) -> None:
         self.command("seek", secs, "relative")
 
     def on_idle(self) -> None:
@@ -401,7 +401,7 @@ class SimpleMplayerSlaveModePlayer(SimpleMplayerPlayer):
         )
         self._wait_for_termination(tag)
 
-    def command(self, *args) -> None:
+    def command(self, *args: Any) -> None:
         """Send a command over the slave interface.
 
         The trailing newline is automatically added."""
@@ -412,7 +412,7 @@ class SimpleMplayerSlaveModePlayer(SimpleMplayerPlayer):
     def seek_relative(self, secs: int) -> None:
         self.command("seek", secs, 0)
 
-    def toggle_pause(self):
+    def toggle_pause(self) -> None:
         self.command("pause")
 
 
@@ -458,12 +458,12 @@ class _Recorder:
 
 
 class PyAudioThreadedRecorder(threading.Thread):
-    def __init__(self, startupDelay) -> None:
+    def __init__(self, startupDelay: float) -> None:
         threading.Thread.__init__(self)
         self.startupDelay = startupDelay
         self.finish = False
 
-    def run(self) -> Any:
+    def run(self) -> None:
         chunk = 1024
         p = pyaudio.PyAudio()
 
@@ -499,7 +499,7 @@ class PyAudioRecorder(_Recorder):
     # discard first 250ms which may have pops/cracks
     startupDelay = 0.25
 
-    def __init__(self):
+    def __init__(self) -> None:
         for t in recFiles + [processingSrc, processingDst]:
             try:
                 os.unlink(t)
@@ -507,15 +507,15 @@ class PyAudioRecorder(_Recorder):
                 pass
         self.encode = False
 
-    def start(self):
+    def start(self) -> None:
         self.thread = PyAudioThreadedRecorder(startupDelay=self.startupDelay)
         self.thread.start()
 
-    def stop(self):
+    def stop(self) -> None:
         self.thread.finish = True
         self.thread.join()
 
-    def file(self):
+    def file(self) -> str:
         if self.encode:
             tgt = "rec%d.mp3" % time.time()
             os.rename(processingDst, tgt)
@@ -530,7 +530,7 @@ Recorder = PyAudioRecorder
 ##########################################################################
 
 
-def getAudio(parent, encode=True):
+def getAudio(parent: QWidget, encode: bool = True) -> Optional[str]:
     "Record and return filename"
     # record first
     r = Recorder()
@@ -547,16 +547,16 @@ def getAudio(parent, encode=True):
     t = time.time()
     r.start()
     time.sleep(r.startupDelay)
-    QApplication.instance().processEvents()
+    QApplication.instance().processEvents()  # type: ignore
     while not mb.clickedButton():
         txt = _("Recording...<br>Time: %0.1f")
         mb.setText(txt % (time.time() - t))
         mb.show()
-        QApplication.instance().processEvents()
+        QApplication.instance().processEvents()  # type: ignore
     if mb.clickedButton() == mb.escapeButton():
         r.stop()
         r.cleanup()
-        return
+        return None
     saveGeom(mb, "audioRecorder")
     # ensure at least a second captured
     while time.time() - t < 1:
diff --git a/qt/aqt/theme.py b/qt/aqt/theme.py
index 6a25f9d6d..492538534 100644
--- a/qt/aqt/theme.py
+++ b/qt/aqt/theme.py
@@ -197,7 +197,7 @@ QTabWidget { background-color: %s; }
 
         app.setPalette(palette)
 
-    def _update_stat_colors(self):
+    def _update_stat_colors(self) -> None:
         import anki.stats as s
 
         s.colLearn = self.str_color("new-count")
diff --git a/qt/aqt/toolbar.py b/qt/aqt/toolbar.py
index 17fc7dfc3..cec90d4b2 100644
--- a/qt/aqt/toolbar.py
+++ b/qt/aqt/toolbar.py
@@ -15,13 +15,13 @@ from aqt.webview import AnkiWebView
 
 # wrapper class for set_bridge_command()
 class TopToolbar:
-    def __init__(self, toolbar: Toolbar):
+    def __init__(self, toolbar: Toolbar) -> None:
         self.toolbar = toolbar
 
 
 # wrapper class for set_bridge_command()
 class BottomToolbar:
-    def __init__(self, toolbar: Toolbar):
+    def __init__(self, toolbar: Toolbar) -> None:
         self.toolbar = toolbar
 
 
@@ -40,7 +40,7 @@ class Toolbar:
         buf: str = "",
         web_context: Optional[Any] = None,
         link_handler: Optional[Callable[[str], Any]] = None,
-    ):
+    ) -> None:
         web_context = web_context or TopToolbar(self)
         link_handler = link_handler or self._linkHandler
         self.web.set_bridge_command(link_handler, web_context)
@@ -90,7 +90,7 @@ class Toolbar:
             f"""{label}</a>"""
         )
 
-    def _centerLinks(self):
+    def _centerLinks(self) -> str:
         links = [
             self.create_link(
                 "decks",
@@ -149,15 +149,15 @@ class Toolbar:
     # Link handling
     ######################################################################
 
-    def _linkHandler(self, link):
+    def _linkHandler(self, link: str) -> bool:
         if link in self.link_handlers:
             self.link_handlers[link]()
         return False
 
-    def _deckLinkHandler(self):
+    def _deckLinkHandler(self) -> None:
         self.mw.moveToState("deckBrowser")
 
-    def _studyLinkHandler(self):
+    def _studyLinkHandler(self) -> None:
         # if overview already shown, switch to review
         if self.mw.state == "overview":
             self.mw.col.startTimebox()
@@ -165,16 +165,16 @@ class Toolbar:
         else:
             self.mw.onOverview()
 
-    def _addLinkHandler(self):
+    def _addLinkHandler(self) -> None:
         self.mw.onAddCard()
 
-    def _browseLinkHandler(self):
+    def _browseLinkHandler(self) -> None:
         self.mw.onBrowse()
 
-    def _statsLinkHandler(self):
+    def _statsLinkHandler(self) -> None:
         self.mw.onStats()
 
-    def _syncLinkHandler(self):
+    def _syncLinkHandler(self) -> None:
         self.mw.onSync()
 
     # HTML & CSS
@@ -206,7 +206,7 @@ class BottomBar(Toolbar):
         buf: str = "",
         web_context: Optional[Any] = None,
         link_handler: Optional[Callable[[str], Any]] = None,
-    ):
+    ) -> None:
         # note: some screens may override this
         web_context = web_context or BottomToolbar(self)
         link_handler = link_handler or self._linkHandler
diff --git a/qt/aqt/webview.py b/qt/aqt/webview.py
index 0efc96969..675b5ec52 100644
--- a/qt/aqt/webview.py
+++ b/qt/aqt/webview.py
@@ -5,7 +5,7 @@ import dataclasses
 import json
 import math
 import sys
-from typing import Any, List, Optional, Tuple
+from typing import Any, Callable, List, Optional, Sequence, Tuple
 
 from anki.lang import _
 from anki.utils import isLin, isMac, isWin
@@ -176,7 +176,7 @@ class AnkiWebView(QWebEngineView):  # type: ignore
         self.onBridgeCmd: Callable[[str], Any] = self.defaultOnBridgeCmd
 
         self._domDone = True
-        self._pendingActions: List[Tuple[str, List[Any]]] = []
+        self._pendingActions: List[Tuple[str, Sequence[Any]]] = []
         self.requiresCol = True
         self.setPage(self._page)
 
@@ -258,13 +258,13 @@ class AnkiWebView(QWebEngineView):  # type: ignore
     def dropEvent(self, evt):
         pass
 
-    def setHtml(self, html):
+    def setHtml(self, html: str) -> None:
         # discard any previous pending actions
         self._pendingActions = []
         self._domDone = True
         self._queueAction("setHtml", html)
 
-    def _setHtml(self, html):
+    def _setHtml(self, html: str) -> None:
         app = QApplication.instance()
         oldFocus = app.focusWidget()
         self._domDone = False
@@ -273,7 +273,7 @@ class AnkiWebView(QWebEngineView):  # type: ignore
         if oldFocus:
             oldFocus.setFocus()
 
-    def zoomFactor(self):
+    def zoomFactor(self) -> float:
         # overridden scale factor?
         webscale = os.environ.get("ANKI_WEBSCALE")
         if webscale:
@@ -295,7 +295,7 @@ class AnkiWebView(QWebEngineView):  # type: ignore
         newFactor = desiredScale / qtIntScale
         return max(1, newFactor)
 
-    def _getQtIntScale(self, screen):
+    def _getQtIntScale(self, screen) -> int:
         # try to detect if Qt has scaled the screen
         # - qt will round the scale factor to a whole number, so a dpi of 125% = 1x,
         #   and a dpi of 150% = 2x
@@ -430,13 +430,13 @@ body {{ zoom: {}; background: {}; {} }}
             fname
         )
 
-    def eval(self, js):
+    def eval(self, js: str) -> None:
         self.evalWithCallback(js, None)
 
-    def evalWithCallback(self, js, cb):
+    def evalWithCallback(self, js: str, cb: Callable) -> None:
         self._queueAction("eval", js, cb)
 
-    def _evalWithCallback(self, js, cb):
+    def _evalWithCallback(self, js: str, cb: Callable[[Any], Any]) -> None:
         if cb:
 
             def handler(val):
@@ -449,11 +449,11 @@ body {{ zoom: {}; background: {}; {} }}
         else:
             self.page().runJavaScript(js)
 
-    def _queueAction(self, name, *args):
+    def _queueAction(self, name: str, *args: Any) -> None:
         self._pendingActions.append((name, args))
         self._maybeRunActions()
 
-    def _maybeRunActions(self):
+    def _maybeRunActions(self) -> None:
         while self._pendingActions and self._domDone:
             name, args = self._pendingActions.pop(0)
 
@@ -464,10 +464,10 @@ body {{ zoom: {}; background: {}; {} }}
             else:
                 raise Exception("unknown action: {}".format(name))
 
-    def _openLinksExternally(self, url):
+    def _openLinksExternally(self, url: str) -> None:
         openLink(url)
 
-    def _shouldIgnoreWebEvent(self):
+    def _shouldIgnoreWebEvent(self) -> bool:
         # async web events may be received after the profile has been closed
         # or the underlying webview has been deleted
         from aqt import mw
@@ -499,18 +499,18 @@ body {{ zoom: {}; background: {}; {} }}
             else:
                 return self.onBridgeCmd(cmd)
 
-    def defaultOnBridgeCmd(self, cmd: str) -> Any:
+    def defaultOnBridgeCmd(self, cmd: str) -> None:
         print("unhandled bridge cmd:", cmd)
 
     # legacy
-    def resetHandlers(self):
+    def resetHandlers(self) -> None:
         self.onBridgeCmd = self.defaultOnBridgeCmd
         self._bridge_context = None
 
-    def adjustHeightToFit(self):
+    def adjustHeightToFit(self) -> None:
         self.evalWithCallback("$(document.body).height()", self._onHeight)
 
-    def _onHeight(self, qvar):
+    def _onHeight(self, qvar: Optional[int]) -> None:
         from aqt import mw
 
         if qvar is None: