Invidious Redirect per äymm

Redirects YouTube requests to an alternative frontend of your choice, defaults to invidio.us. The settings page allows you to configure a specific
Invidious instance to which the request will be redirected. Choose your instance here. You can also use a different
instnace for embeddable content and normal tabs.

This extension was derived from @doronbehar version but I've added a fix, so that the "Watch on Youtube" button actually opens Youtube instead of getting redirected back to invidious as well as enabling it
for Firefox on Android