Currently extensions are arranged/lit up by whether they have or need permissions to the current site. I had assumed the greyed out extensions were add-ons that were disabled.
Maybe the Unified Extensions feature could replicate the most useful features of the Add-ons Manager functionality (which is a separate, clunky tab).
1. List ALL add-ons, including disabled ones (just like Add-ons Manager, except in alphabetical order. This is because you can't Ctrl+F to Find an extension in Add-on Manager).
2. Each extension could have a enable/disable toggle. This would make it easy for testing/tinkering, and make it clear and accessible.
3. Change or remove the lengthy/confusing "can always read and change data on this site" etc. Maybe it could be an icon instead? I personally don't find it that useful.
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I think the extensions with grayed text do not have a browser action defined. Before this Extensions menu was created, they could not be added to either the main part of the toolbar or the overflow menu.
Because this drop-down can become overly long, and currently cannot be reorganized, there is a discussion of layout ideas over here:
yes please. i want simple enable/disable addons too!
'Disable Extension' option in the 'Context Menu' on 'Extension Buttons'?
Can we have a 'Disable Extension' option in the right-button Context Menu on Extension Buttons? [There are already Manage, Remove, and a Report Extension options there] May be instead of almost-never-used 'Report Extension' option in the context menu, a 'Disable Extension' option [to be enabled later, when needed] would be better... or an option to customize that context menu as alternative...
(Note: a similar idea has been merged into this thread)
Please add this feature, it will be very helpful
I'll throw in a different voice: How is a separate tab "clunky"?
It allows a lot of interesting functionality that a pop-up, by necessity, cannot. For starters, it mirrors cleanly onto the mobile browser (a popup is always a problem there). It can show dynamically expanding areas for each addon. A tab is the native element of a modern browser anyways. It can dynamically arrange extensions according to screen width in multiple columns.
So, in fact, I'd go the opposite direction: