Mozilla has just released version 100 of Firefox, and there are several new features that mark the browser's milestone update, including new accessibility options, easier payments, stronger browsing security, and more. The features are split between the desktop and mobile versions of Firefox, so we'll cover them in their own separate sections.
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While Google Chrome reached version 100 in March and there weren't many major features marking this milestone, Firefox 100 seems to be different.
New features in Firefox 100 on desktop
On desktop, Firefox 100's frame capabilities enhance the browser's accessibility.
First, video captions will now appear when watching in Picture-in-Picture mode. At launch, Firefox supports PIP captions for YouTube, Hulu, Netflix, Twitter , and Coursera videos, as well as any other sites that use the WebVTT video format.

Further support for additional streaming services is planned, and Mozilla is asking users to vote on which platforms they want Firefox to add next. To use PIP subtitles, turn on subtitles from the video's playback controls, then click the message to enable Firefox's PIP feature.
The other accessibility feature for desktop is the new first-run language change prompt. Now, when you run Firefox, the browser will check your device's current default language settings and ask you if you want to change them if it notices that settings are different. This process happens automatically, but you can change Firefox's language settings in Settings > General > Language and Appearance.
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Along with these changes, Firefox 100 also expands support for autofilling saved payment information to users outside of North America and now includes the United Kingdom, France , and Germany.
All of these new Firefox features are now available to Windows, Mac, and Linux users. Open Firefox and go to Settings > General and scroll down to “Firefox Updates,” then click “Check for Updates” to get started, or download the latest installation from here.

New Firefox mobile features
For Android users, the main addition in Firefox 100 is a new HTTPS-only browsing feature. HTTPS is a more secure connection than standard HTTP browsing and is much safer to use, and Firefox will now automatically connect over these more secure connections whenever possible.
Other changes to Firefox for mobile include new browser wallpapers for iOS and Android that you can enable in the app's Settings menu, as well as improved and easier-to-manage browsing history and tab switching. The changes include removing or merging duplicate entries from your browsing history and moving open tabs that haven't been viewed for more than 14 days to a new inactive tabs section.
See also: Mozilla removes default Russian search providers in Firefox
The new Firefox app features are now available for Android users, while iOS users will receive the update within the week.
Information source: ifehacker.com
