Didn't do much to fix anything, and then yesterday Google decided my browser isn't secure with this addon and logged me out of my gmail and youtube accounts. Only after removing this addon I was able to log back in.

every website can still detect it's firefox

90% of all apps that dont want to run in Firefox, still dont run in fire fox. This is literally useless. On top of that, Youtube gets bugged by this app. Isnt the point of this app is to fool google websites?

Literally broke youtube..... Broken code. Fix it

Not very effective at masking. "whatismybrowser" will still pick up that the browser "looks like firefox"; and so will many other sites.

Here it does nothing. For instance, on Google search (www.google.com) using Chrome we have that "Search Labs" option/icon up on the right of the page. Using Firefox we don't see that, even enlabling this extension to act on that page.