- Add number animations in web UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12948), [Gargron](https://github.com/tootsuite/mastodon/pull/12971))
- Add `kab`, `is`, `kn`, `mr`, `ur` to available locales ([Gargron](https://github.com/tootsuite/mastodon/pull/12882), [BoFFire](https://github.com/tootsuite/mastodon/pull/12962), [Gargron](https://github.com/tootsuite/mastodon/pull/12379))
- Add ability to add oneself to lists ([ThibG](https://github.com/tootsuite/mastodon/pull/12271))
- Add hint how to contribute translations to preferences page ([Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12736))
- Add signatures to statuses in archive takeout ([noellabo](https://github.com/tootsuite/mastodon/pull/12649))
- Add support for `magnet:` and `xmpp` links ([ThibG](https://github.com/tootsuite/mastodon/pull/12905), [ThibG](https://github.com/tootsuite/mastodon/pull/12709))
- Add `follow_request` notification type ([ThibG](https://github.com/tootsuite/mastodon/pull/12198))
- Add ability to filter reports by account domain in admin UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12154))
- Add link to search for users connected from the same IP address to admin UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12157))
- Add link to reports targeting a specific domain in admin view ([ThibG](https://github.com/tootsuite/mastodon/pull/12513))
- Add support for EventSource streaming in web UI ([BenLubar](https://github.com/tootsuite/mastodon/pull/12887))
- Add hotkey for opening media attachments in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12498), [Kjwon15](https://github.com/tootsuite/mastodon/pull/12546))
- Add relationship-based options to status dropdowns in web UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12377), [ThibG](https://github.com/tootsuite/mastodon/pull/12535), [Gargron](https://github.com/tootsuite/mastodon/pull/12430))
- Add support for submitting media description with `ctrl`+`enter` in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12272))
- Add download button to audio and video players in web UI ([NimaBoscarino](https://github.com/tootsuite/mastodon/pull/12179))
- Add setting for whether to crop images in timelines in web UI ([duxovni](https://github.com/tootsuite/mastodon/pull/12126))
- Add support for `Event` activities ([tcitworld](https://github.com/tootsuite/mastodon/pull/12637))
- Add basic support for `Group` actors ([noellabo](https://github.com/tootsuite/mastodon/pull/12071))
- Add `--remote-only` option to `tootctl emoji purge` ([ThibG](https://github.com/tootsuite/mastodon/pull/12810))
- Add `tootctl media remove-orphans` ([Gargron](https://github.com/tootsuite/mastodon/pull/12568), [Gargron](https://github.com/tootsuite/mastodon/pull/12571))
- Add `tootctl media lookup` command ([irlcatgirl](https://github.com/tootsuite/mastodon/pull/12283))
- Add cache for OEmbed endpoints to avoid extra HTTP requests ([Gargron](https://github.com/tootsuite/mastodon/pull/12403))
- Add support for KaiOS arrow navigation to public pages ([nolanlawson](https://github.com/tootsuite/mastodon/pull/12251))
- Add `discoverable` to accounts in REST API ([trwnh](https://github.com/tootsuite/mastodon/pull/12508))
- Add admin setting to disable default follows ([ArisuOngaku](https://github.com/tootsuite/mastodon/pull/12566))
- Add support for LDAP and PAM in the OAuth password grant strategy ([ntl-purism](https://github.com/tootsuite/mastodon/pull/12390))
- Allow support for `Accept`/`Reject` activities with a non-embedded object ([puckipedia](https://github.com/tootsuite/mastodon/pull/12199))
### Changed
- Change `last_status_at` to be a date, not datetime in REST API ([ThibG](https://github.com/tootsuite/mastodon/pull/12966))
- Change followers page to relationships page in admin UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12927), [Gargron](https://github.com/tootsuite/mastodon/pull/12934))
- Change reported media attachments to always be hidden in admin UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12879), [ThibG](https://github.com/tootsuite/mastodon/pull/12907))
- Change string from "Disable" to "Disable login" in admin UI ([nileshkumar](https://github.com/tootsuite/mastodon/pull/12201))
- Change report page structure in admin UI ([Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12615))
- Change swipe sensitivity to be lower on small screens in web UI ([umonaca](https://github.com/tootsuite/mastodon/pull/12168))
- Change audio/video playback to stop playback when out of view in web UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12486))
- Change media description label based on upload type in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12270))
- Change large numbers to render without decimal units in web UI ([noellabo](https://github.com/tootsuite/mastodon/pull/12706))
- Change "Add a choice" button to be disabled rather than hidden when poll limit reached in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12319), [hinaloe](https://github.com/tootsuite/mastodon/pull/12544))
- Change `tootctl statuses remove` to keep statuses favourited or bookmarked by local users ([ThibG](https://github.com/tootsuite/mastodon/pull/11267), [Gomasy](https://github.com/tootsuite/mastodon/pull/12818))
- Change domain block behavior to update user records (fast) before deleting data (slower) ([ThibG](https://github.com/tootsuite/mastodon/pull/12247))
- Change behaviour to strip audio metadata on uploads ([hugogameiro](https://github.com/tootsuite/mastodon/pull/12171))
- Change accepted length of remote media descriptions from 420 to 1,500 characters ([ThibG](https://github.com/tootsuite/mastodon/pull/12262))
- Change format of titles in RSS ([devkral](https://github.com/tootsuite/mastodon/pull/8596))
- Change favourite icon animation from spring-based motion to CSS animation in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12175))
- Change minimum required Node.js version to 10, and default to 12 ([Shleeble](https://github.com/tootsuite/mastodon/pull/12791), [mkody](https://github.com/tootsuite/mastodon/pull/12906), [Shleeble](https://github.com/tootsuite/mastodon/pull/12703))
- Change spam check to exempt server staff ([ThibG](https://github.com/tootsuite/mastodon/pull/12874))
- Change to fallback to to `Create` audience when `object` has no defined audience ([ThibG](https://github.com/tootsuite/mastodon/pull/12249))
- Change Twemoji library to 12.1.3 in web UI ([koyuawsmbrtn](https://github.com/tootsuite/mastodon/pull/12342))
- Change blocked users to be hidden from following/followers lists ([ThibG](https://github.com/tootsuite/mastodon/pull/12733))
- Fix some translatable strings being used wrongly ([Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12569), [Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12589), [Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12502), [mayaeh](https://github.com/tootsuite/mastodon/pull/12231))
- Fix headline of public timeline page when set to local-only ([ykzts](https://github.com/tootsuite/mastodon/pull/12224))
- Fix space between tabs not being spread evenly in web UI ([Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12944), [Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12961), [Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12446))
- Fix interactive delays in database migrations with no TTY ([Gargron](https://github.com/tootsuite/mastodon/pull/12969))
- Fix status overflowing in report dialog in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12959))
- Fix unlocalized dropdown button title in web UI ([Sasha-Sorokin](https://github.com/tootsuite/mastodon/pull/12947))
- Fix media attachments without file being uploadable ([Gargron](https://github.com/tootsuite/mastodon/pull/12562))
- Fix unfollow confirmations in profile directory in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12922))
- Fix duplicate `description` meta tag on accounts public pages ([ThibG](https://github.com/tootsuite/mastodon/pull/12923))
- Fix slow query of federated timeline ([notozeki](https://github.com/tootsuite/mastodon/pull/12886))
- Fix not all of account's active IPs showing up in admin UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12909), [Gargron](https://github.com/tootsuite/mastodon/pull/12943))
- Fix search by IP not using alternative browser sessions in admin UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12904))
- Fix “X new items” not showing up for slow mode on empty timelines in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12875))
- Fix OEmbed endpoint being inaccessible in secure mode ([Gargron](https://github.com/tootsuite/mastodon/pull/12864))
- Fix proofs API being inaccessible in secure mode ([Gargron](https://github.com/tootsuite/mastodon/pull/12495))
- Fix invalid poll votes being accepted in REST API ([ThibG](https://github.com/tootsuite/mastodon/pull/12601))
- Fix old migrations failing because of strong migrations update ([ThibG](https://github.com/tootsuite/mastodon/pull/12787), [ThibG](https://github.com/tootsuite/mastodon/pull/12692))
- Fix reuse of detailed status components in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12792))
- Fix base64-encoded file uploads not being possible in REST API ([Gargron](https://github.com/tootsuite/mastodon/pull/12748), [Gargron](https://github.com/tootsuite/mastodon/pull/12857))
- Fix resource_owner_from_credentials in Doorkeeper initializer ([Gargron](https://github.com/tootsuite/mastodon/pull/12743))
- Fix error due to missing authentication call in filters controller ([Gargron](https://github.com/tootsuite/mastodon/pull/12746))
- Fix uncaught unknown format error in host meta controller ([Gargron](https://github.com/tootsuite/mastodon/pull/12747))
- Fix URL search not returning private toots user has access to ([ThibG](https://github.com/tootsuite/mastodon/pull/12742), [ThibG](https://github.com/tootsuite/mastodon/pull/12336))
- Fix cache digesting log noise on status embeds ([Gargron](https://github.com/tootsuite/mastodon/pull/12750))
- Fix slowness due to layout thrashing when reloading a large set of statuses in web UI ([panarom](https://github.com/tootsuite/mastodon/pull/12661), [panarom](https://github.com/tootsuite/mastodon/pull/12744), [Gargron](https://github.com/tootsuite/mastodon/pull/12712))
- Fix error when fetching followers/following from REST API when user has network hidden ([Gargron](https://github.com/tootsuite/mastodon/pull/12716))
- Fix IDN mentions not being processed, IDN domains not being rendered ([Gargron](https://github.com/tootsuite/mastodon/pull/12715))
- Fix error when searching for empty phrase ([Gargron](https://github.com/tootsuite/mastodon/pull/12711))
- Fix backups stopping due to read timeouts ([chr-1x](https://github.com/tootsuite/mastodon/pull/12281))
- Fix batch actions on non-pending tags in admin UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12537))
- Fix manual scrolling issue on Firefox/Windows in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12648))
- Fix archive takeout failing if total dump size exceeds 2GB ([scd31](https://github.com/tootsuite/mastodon/pull/12602), [Gargron](https://github.com/tootsuite/mastodon/pull/12653))
- Fix custom emoji category creation silently erroring out on duplicate category ([ThibG](https://github.com/tootsuite/mastodon/pull/12647))
- Fix link crawler not specifying preferred content type ([ThibG](https://github.com/tootsuite/mastodon/pull/12646))
- Fix featured hashtag setting page erroring out instead of rejecting invalid tags ([ThibG](https://github.com/tootsuite/mastodon/pull/12436))
- Fix tooltip messages of single/multiple-choice polls switcher being reversed in web UI ([acid-chicken](https://github.com/tootsuite/mastodon/pull/12616))
- Fix typo in help text of `tootctl statuses remove` ([trwnh](https://github.com/tootsuite/mastodon/pull/12603))
- Fix generic HTTP 500 error on duplicate records ([Gargron](https://github.com/tootsuite/mastodon/pull/12563))
- Fix old migration failing with new status default scope ([ThibG](https://github.com/tootsuite/mastodon/pull/12493))
- Fix errors when using search API with no query ([Gargron](https://github.com/tootsuite/mastodon/pull/12541), [trwnh](https://github.com/tootsuite/mastodon/pull/12549))
- Fix poll options not being selectable via keyboard in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12538))
- Fix conversations not having an unread indicator in web UI ([Gargron](https://github.com/tootsuite/mastodon/pull/12506))
- Fix lost focus when modals open/close in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12437))
- Fix pending upload count not being decremented on error in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12499))
- Fix empty poll options not being removed on remote poll update ([ThibG](https://github.com/tootsuite/mastodon/pull/12484))
- Fix OCR with delete & redraft in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12465))
- Fix OEmbed discovery not handling different URL variants in query ([Gargron](https://github.com/tootsuite/mastodon/pull/12439))
- Fix link crawler crashing on `<a>` tags without `href` ([ThibG](https://github.com/tootsuite/mastodon/pull/12159))
- Fix whitelisted subdomains being ignored in whitelist mode ([noiob](https://github.com/tootsuite/mastodon/pull/12435))
- Fix broken audit log in whitelist mode in admin UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12303))
- Fix unread indicator not honoring "Only media" option in local and federated timelines in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12330))
- Fix error when rebuilding home feeds ([dariusk](https://github.com/tootsuite/mastodon/pull/12324))
- Fix relationship caches being broken as result of a follow request ([ThibG](https://github.com/tootsuite/mastodon/pull/12299))
- Fix more items than the limit being uploadable in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12300))
- Fix various issues with account migration ([ThibG](https://github.com/tootsuite/mastodon/pull/12301))
- Fix filtered out items being counted as pending items in slow mode in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12266))
- Fix notification filters not applying to poll options ([ThibG](https://github.com/tootsuite/mastodon/pull/12269))
- Fix notification message for user's own poll saying it's a poll they voted on in web UI ([ykzts](https://github.com/tootsuite/mastodon/pull/12219))
- Fix polls with an expiration not showing up as expired in web UI ([noellabo](https://github.com/tootsuite/mastodon/pull/12222))
- Fix volume slider having an offset between cursor and slider in Chromium in web UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12158))
- Fix Vagrant image not accepting connections ([shrft](https://github.com/tootsuite/mastodon/pull/12180))
- Fix batch actions being hidden on small screens in admin UI ([ThibG](https://github.com/tootsuite/mastodon/pull/12183))
- Fix incoming federation not working in whitelist mode ([ThibG](https://github.com/tootsuite/mastodon/pull/12185))
- Fix error when passing empty `source` param to `PUT /api/v1/accounts/update_credentials` ([jglauche](https://github.com/tootsuite/mastodon/pull/12259))
- Fix HTTP-based streaming API being cacheable by proxies ([BenLubar](https://github.com/tootsuite/mastodon/pull/12945))
- Fix users being able to register while `tootctl self-destruct` is in progress ([Kjwon15](https://github.com/tootsuite/mastodon/pull/12877))
- Fix microformats detection in link crawler not ignoring `h-card` links ([nightpool](https://github.com/tootsuite/mastodon/pull/12189))
- Fix outline on full-screen video in web UI ([hinaloe](https://github.com/tootsuite/mastodon/pull/12176))
- Fix TLD domain blocks not being editable ([ThibG](https://github.com/tootsuite/mastodon/pull/12805))