The Tab Groups (Panorama) feature has been removed from Firefox. We know this may be inconvenient and we apologize. Removing the Tab Groups feature makes it easier for us to improve Firefox. Thankfully, the Mozilla community has come through with some great replacements for Tab Groups. This article covers your options.
All your Tab Groups have been bookmarked and stored in the Bookmarks folder. You can access them by clicking the Bookmarks button in the toolbar.
Firefox has also made a one-time backup of your Tab Groups data that is stored in your profile folder. Add-ons may be able to use this data to recreate your Tab Groups.
If you want a direct replacement for the Tab Groups feature, try the Tab Groups add-on. It was created directly from the Firefox code and works just like the current feature. It will be as if the feature was not removed from Firefox. This add-on aims to fully replace Tab Groups in Firefox, providing a similar and hopefully even enhanced experience.
Once installed, you can import your old Tab Groups from the backup file that was saved when you updated to Firefox 45:
You can now continue using Tab Groups as if the feature hadn't been removed from Firefox.
Got too many open tabs? You can use two easy bookmark commands to keep everything organized.