this post was submitted on 11 Jun 2025
510 points (98.5% liked)
Firefox
5628 readers
16 users here now
A community for discussion about Mozilla Firefox.
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Sorry for AI but I couldn't find it by just googling:
Yes, Firefox did have an in-house developed "Tab Center" โ it was an experimental feature created by Mozilla as part of their Test Pilot programme around 2016โ2017.
๐งช Mozilla's Original "Tab Center" Name: Tab Center
Status: Experimental Test Pilot feature (now discontinued)
Timeframe: Circa 2016โ2017
Purpose: To explore the usability of vertical tabs on the left side of the browser, instead of the traditional horizontal layout.
๐ Key Features Displayed open tabs vertically in a sidebar.
Showed a more spacious, scrollable list of tabs.
Included favicons and tab titles โ easier to manage lots of tabs.
Supported mouse gestures like tab pinning and closing.
Looked and felt very similar to Edgeโs modern vertical tabs.
Ah TIL! I think it was finally added as of version 136, fairly recently.