• Fix theming related hang on startup with GTK ≥ 4.23.1 (#249)
• Drop support for the general.theme config file option with GTK < 4.20

• Migrate to GTK-4
• Modernize the look of dialogs
• Make spell-check dialog text directly editable
• Combine window titlebar and toolbar into a header bar
• Allow overriding encoding and newlines when saving (#137)
• Follow the system-wide dark theme preference (GTK ≥ 4.20), overridable with the general.theme config file option, which replaces the previous general.dark_theme option
• Drop support for extensions; replace the custom-framerates extension with config file option editor.custom_framerates
• Switch the integrated video player from gtksink to gtk4paintablesink
• Use a one-second preview offset for all external video players
• Raise Python dependency to ≥ 3.10
• Raise PyGObject dependency to ≥ 3.40
• Raise GTK dependency to ≥ 4.12
• Raise GStreamer dependency to ≥ 1.18
• Replace gspell dependency with libspelling ≥ 0.2
• Fully rewritten installation mechanism, see README.md and PACKAGING.md

Two fixes for compatibility with Python 3.15, which can be expected to
be released around fall 2026. These have both been deprecated for a
while, but will be removed in 3.15.

• Don't use deprecated locale.getdefaultlocale (#226)
• Don't use deprecated importlib.load_module (#227)

• Don't merge font tags with different values (#224)
• Drop dependency on chardet
• Add dependency on charset-normalizer
• Raise Python dependency to >= 3.5

• Fix invalid entry in AppData file (#219)

• Change the icon for the toggle video player toolbar item to an action icon (not mimetype) that has a symbolic version available
• Fix installation on Python >= 3.12 by using distutils from setuptools

• Fix translations missing for enums (#210)
• Fix Python 3.12 compatibility and drop support for Python < 3.4 (#211)
• Add Chinese (China) translation (tzwasd)

• Don't remember window position on screen (seems more common and better left to the window manager)
• Fix cursor construction error on Wayland (#202)

• Add IBM858, ISO-8859-11 and ISO-8859-16 encodings
• Fix displayed line lengths being incorrect for subtitles with special characters such as apostrophes

• Fix playing selection (#188)