Review for RSS Icon in url bar by Soustruh
Rated 3 out of 5 stars
Users who reported the same problem as me: Charles Milette, Underpass
Quoting Underpass: Even with version 1.4 the problem is the same: the toolbar cannot be modified since, after a Firefox restart, it reverts back to the layout it had before this addon was installed.
I can just confirm this still happens with 1.5.
To create your own collections, you must have a Mozilla Add-ons account.