Add documentation to remove the profiler toolbar button

[squelart]

A user tried the Profiler (out of curiosity, without a real need for it), but then didn't know how to remove the profiler toolbar button, and the shortcuts were blocking another add-on. They searched the documentation but didn't find help there.

It would be nice to add some easy-to-find documentation for that situation.

The action is actually very simple: Right-click on the button, and click "Remove from Toolbar".
But it may not be obvious to users that this is the way to disable the profiler and its shortcuts, so the documentation should clarify this relationship.

[Dreamsorcerer]

I was also looking for this after using one time to provide information in a bug report.

I just wanted to revert to the state before enabling, I seem to have managed to do this by reverting the 'devtools.performance.*' settings in about:config.

[ant0nioli]

Same here, I would appreciate some information about reverting to the state before enabling, as also @Dreamsorcerer stated.
In my opinion it should be included in the official documentation and in the project repository's homepage.

[LenzGr]

I fully agree - please add some guidance on how to remove this tool. My research on this topic brought me here :)