Cannot create a pull request in Firefox 68.0 on Win10

Marc Walter_moazv7

Hello,

when I try to create a pull request using Firefox, it fails with multiple errors, first is `this.storage is undefined` (see attached image).

When I use chrome 76, it works.Is this a known issue?

Juan_Riquelme_González

This also happens in Ubuntu, same Firefox version (Developer Edition).

Also affects to other parts of the site. The only extensions installed are «React Developer Tools» and «Redux Tools».