New:

Add Auto resize columns functionality
Allow to use Category paths in Manual mode
Allow to disable Automatic mode when default “temp” path changed
Add tuning options related to performance warnings
Add right click menu for status filters
Allow setting the number of maximum active checking torrents
Add option to toggle filters sidebar
Allow to set working set limit on non-Windows OS
Add Export .torrent action
Add keyboard navigation keys
Allow to use POSIX-compliant disk IO type
Add Filter files field in new torrent dialog
Implement new icon/color theme
Add file name filter/blacklist
Add support for custom SMTP ports
Split the OS cache settings into Disk IO read/write modes
When duplicate torrent is added set metadata to existing one
Greatly improve startup time with many torrents
Add keyboard shortcut to Download URL dialog
Add ability to run external program on torrent added
Add infohash and download path columns
Allow to set torrent stop condition
Add a Moving status filter
Change color palettes for both dark, light themes
Add a Use proxy for hostname lookup option
Introduce a change listen port cmd option
Implement Peer ID Client column for Peers tab
Add port forwarding option for embedded tracker
Fixed:

Store hybrid torrents using torrent ID as basename
Enable Combobox editor for the Mixed file download priority
Allow shortcut folders for the Open and Save directory dialogs
Rename content tab Size column to Total Size
Fix scrolling to the lowermost visible torrent
Allow changing file priorities for finished torrents
Focus save path when Manual mode is selected initially
Disable force reannounce when it is not possible
Add horizontal scrolling for tracker list and torrent content
Enlarge “speed limits” icons
Change Downloaded to Times Downloaded in trackers tab
Remove artificial max limits from Torrent Queueing related options
Preserve skip hash check when there is no metadata
Fix DHT/PeX/LSD status when it is globally disabled
Fix rate calculation when interval is too low
Add tooltip message when system tray icon isn’t available
Improve sender field in mail notifications
Fix “Add torrent dialog” spill-over on smaller screens
Fix peer count issue when tracker responds with zero figure
Don’t merge trackers by default
Don’t inhibit system sleep/auto shutdown for torrents stuck at downloading metadata
Allow to pause a checking torrent from context menu
Allow to use subnet notation in reverse proxy list
Fine tune translations loading for Chinese locales
Fix torrent content checkboxes not updated properly
Correctly load state of Use another path for incomplete torrents in Watched folders
Add confirmation to resume/pause all
Fix wrong count of errored trackers
WebUI:

Allow blank lines in multipart form-data input
Make various dialogs resizable
Fix wrong v2 hash string displayed
WebAPI: return correct status
Fix empty selection in language combobox
Store WebUI port setting in human readable number
Add support for exporting .torrent
WebAPI: Add endpoint to set speed limit mode
Improve progress bar rendering
Add transfer list refresh interval settings
Use natural sort
Apply i18n translation only to built-in WebUI
Alert when HTTPS settings are incomplete
Handle drag and drop events
Fix wrong behavior for shutdown action
Don’t disable combobox for file priority
rss:

Increase limit of maximum number of articles per feed
Windows:

Fix Open destination folder delay on Windows
WINDOWS: NSIS: Update Russian, Estonian, Japanese, Dutch, Portuguese BR, German and Indonesian translations
Linux:

Mark as single window app in .desktop file
Add Dockerfile
Remove option of using icons from system theme
macOS:

Fix wrong background color in properties widget
Other:

Binary distributions of qbittorrent are GPLv3+ licensed