Firefox used to have an 'email link' menu option, which would open the email program defined in the Firefox preferences. In my case Gmail. This option has been replaced by the 'Share' menu options, where choosing 'Mail' opens Apple's mail program, not the Gmail which is my preferred e-mail client. I'm using MacOS 11.6. The 'Share' menu options are Apple system extensions and I can't see a way to add Gmail to those. Does anybody have a solution?