Firefox released its 100th update, and some fanfare accompanied the release on Mozilla's blog about the web browser. Firefox 100 is available this week for both desktop and mobile versions.

To celebrate, Mozilla says it will be regularly sharing fan art inspired by Firefox throughout May. But while that 100 number carries some symbolic weight, the update itself isn't particularly monumental.

On the desktop, subtitles and captions are now supported in Firefox's picture-in-picture mode for videos. Three key websites officially support subtitles and captions in PIP: YouTube, Netflix, and Amazon Prime Video. Plus, the feature works on websites that support the WebVTT standard, like Twitter.

That's as far as new features go for desktop, but there's more going on on the mobile side. First, there's a new browser history view. Mozilla says it reduced clutter in this new history panel by removing duplicates and automatically grouping related items—like multiple pages visited from the same search query. You can search your history with a text field now, too.

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"Clutter-free" is also the name of the game for improvements to tabs on mobile. To help users who tend to leave tabs open for weeks with the intent to get to them eventually, creating unmanageable clutter, Firefox now automatically re-sorts tabs you haven't viewed for 14 days into an "inactive tabs" section.

There are also two new wallpapers for Android and iOS, called "beach vibes" and "twilight hills." Other changes include HTTPS-only mode on Android, a prompt to select a language at first launch, and the expansion of the credit card autofill feature (previously seen in only North America) to the UK, France, and Germany.

Android received several of these features right away, but iOS should have them by the end of the week, Mozilla says.