Tab Groups is a brand new add-on for the Firefox web browser that replicates the functionality of Firefox's built-in tab grouping feature.
Mozilla announced some time ago that Tab Groups would be one of the features that it would remove from Firefox as part of the organization's "great or dead" project.
A core reason for the decision was the feature's low usage numbers, but also that it caused overhead during development as it needed to be adjusted regularly based on changes made to Firefox's core mechanics.
Mozilla hoped that add-on developers would re-introduce the feature to Firefox. The first add-on to do that was Simplified Tab Groups which added the core functionality to Firefox but did not replicate the functionality exactly.
While it supports the main functionality, that is the creation of different groups of tabs and the ability to switch between those groups, it did not offer the UI that was a major part of the feature in Firefox.
The new Firefox add-on Tab Groups fills that gap as it replicates the functionality exactly. It has been created by Quicksaver, an author responsible for add-ons like FindBar Tweak, OmniSidebar or Beyond Australis.
The add-on picks up existing tab groups and takes over flawlessly in the background. This means that you can install it right now to replace the native Firefox implementation without losing any functionality in the process.
In fact, it is recommended to do so considering that you may not be able to restore tab groups once Mozilla removes the feature from the web browser.
Mozilla plans to migrate tab groups to bookmarks, and to save a backup file to the desktop as well. The Tab Groups add-on is compatible with that backup file which means that you can restore it as long as you have access to that file.
The Tab Groups add-on adds a toolbar icon to Firefox that opens a visual representation of all tabs and groups open in Firefox currently.
You can drag and drop tabs to groups using it, and switch between groups with a single mouse click. Options to name groups for better recognition are provided as well.
New groups are created with a right-click on a tab and the selection of "Move to Group > New Group" from the context menu. There you find options to move tabs between groups directly as well.
You may use the keyboard shortcut Ctrl-Shift-E instead to open the Tab Groups interface. The options provide you with the means to change the keyboard shortcut, and to disable the zooming animation.
Last but not least, a backup and restore function has been implemented on the options page on top of that which you can use for safe-keeping.
Tab Groups is the real deal. It replicates Firefox's Panorama functionality, takes over without you noticing that it does, and can even load the backup file created by the browser when the native tab grouping feature is dropped.
If you use Tab Groups currently and want to continue using the feature, this is the add-on you need to get for that.
If you like how Microsoft Edge looks but prefer to use the Firefox browser, then you may be able to get the best of both worlds by installing the third-party Mozilla Edge theme in Firefox.
I don't particularly like the looks of Microsoft Edge as I think it is too minimalist not only in functionality but also in design.
But, tastes differ and there are certainly users out there who prefer Edge's design over that of other browsers.
If you are one of them, you may be able to turn Firefox into a Microsoft Edge copy without sacrificing functionality in the process.
Before we take a look at the process, I'd like to show you a screenshot of how the fully converted Firefox looks like after you have made the changes to the browser.
The process has two prerequisites:
Download the theme from Deviant Art once you have installed the two add-ons in Firefox and restarted the browser. Extract it afterwards on your system and open the folder afterwards.
Open the Main Theme folder and load the text file located in it in a plain text editor. Use Ctrl-a to highlight everything and Ctrl-c to copy the contents to the clipboard.
Switch to Firefox afterwards, load about:addons in the address bar and hit enter. Switch to the user styles sidebar entry and select "write new style" from the top.
Enter a name for the new style and paste all contents into the editor afterwards using Ctrl-v. Click the save button in the end to complete the process.
You should see the changes immediately as the style information are picked up by Firefox automatically when you hit the save button.
If everything went well Firefox should now look a lot more like Microsoft Edge. This not only includes colors and the general layout of the browser but also the menu which looks more like Edge's menu when you open it as you can see on the screenshot above.
I have not tested this under older versions of Windows or other operating systems but I see no reason why the theme should not work in those versions as well.
You can undo all changes at any time by disabling or removing the Edge style again from the Firefox browser in the add-ons manager.