"Firefox doesn't know how to open this address because the protocall (call to) isn't associated with any program"
Specifically when composing emails in gmail in the new compose window, Firefox (multiple tab sessions sometimes) suddenly completely crashes closing exiting all tabs but keeping one new browser window open that has a gray screen and the above error message in the middle. I recently started using a signature which just has my name and phone number below it. I noticed when I get to the bottom of an email toward the signature below the 3 little dots, this is when the crash tends to happen, although at other times I'm a couple lines above and it still occurs.
It's starting to affect my work, because I send a lot of emails. Any help is graciously appreciated.