Comment 438 for bug 263435

(In reply to comment #424)
> What I suggest is that at least the following key combinations:
>
> - Alt+D
> - Alt+F4
> - Ctrl+Tab
> - Ctrl+T
> - Ctrl+W/Ctrl+F4
>
> Be reserved for the browser with no way for plugins to override them.

If such temporary solution is possible to get in 4.0, then +1, it's better than nothing. But what about a simple Esc key, which would exit plugin mode, and allow entering any shortcuts to browser (as a temporary solution)? This way we wouldn't have to agree on exact list of reserved keys: all keys except Esc could be used in both plugin and browser mode.

And as for better (later) solution, we can allow all keys without switching mode, and allow user to rebind conflicting ones on the side of plugins.