I was hoping that Copycat would allow me to copy text together with font and color. Would you consider adding this feature?

The problem is that when copying text from a page using Firefox, the font and color are not copied. Other browsers don't have this problem. I reported it as a bug to Firefox, but got a reply that this is desired behavior: https://support.mozilla.org/en-US/questions/1440671

It certainly isn't desired for me.

Edit: There's an old open bug for this: https://bugzilla.mozilla.org/show_bug.cgi?id=406488

why not add some hotkey or better let user modify keymap

Icon text should be "Copycat - Options", otherwise it's difficult to guess which extension options it will open.
Options Page should contain explanations for options values.
Also I would suggest Author to try to open options with click on its icon when writing a review ;-)
(long text in options window is visible only partialy).