Mastodon version 4.0 was released earlier today, following an extended testing period — beta and release candidate (RC) versions were already running on some servers, like mastodon.social and mastodon.online.
There are several improvements to hashtags, such as the ability to follow hashtags as if they were user accounts, so they appear in your Home timeline alongside posts from regular accounts. That might make your feed a bit more difficult to read, especially on larger servers that track more posts, but it could come in handy. Featured tags are also now visible in the web interface, instead of only appearing in some mobile apps.
Mastodon 4.0 also improves multi-language support. Posts can now be translated from one language to another, using either DeepL or LibreTranslate behind the scenes, if the administrator running your server sets it up. You can also set preferred languages for trending status and links, and filter posts by language.
There are many other minor changes in the update. You can now directly upload HEIC, AVIF, and WebP files, instead of converting them manually first. The web interface also looks slightly different, matching the project’s current purple logo and color scheme, and changing the “Toot” button to “Publish.” Server administrators can also create roles and assign them to specific accounts, like roles in web forums or Discord servers.
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Mastodon 4.0 is an update to the software that powers each server, not an update to the mobile apps. That means you’ll only get access to it when the administrator(s) running your server has time to perform the update.
Source: GitHub
