TBB with -allow-remote conflict with Firefox and leak opened pages to it
How to reproduce: install Firefox (not Iceweasel, binary from mozilla.org, or Ubuntu package), open it, then run TBB with -allow-remote 'https://torproject.org'. It opens new tab in Firefox, when it should run Tor Browser.
It causes major problems if you want to use torbrowser-launcher as your default browser, there is issue for it https://github.com/micahflee/torbrowser-launcher/issues/157
Building Firefox --with-app-name=torbrowser and --with-app-basename=torbrowser fix that. It shouldn't cause any fingerprinting issues.