When Google _wants_ to make sure something they create works with Firefox, they take some steps to make that happen. Things like filing bugs on issues in Firef

When Google _wants_ to make sure something they create works with Firefox, they take some steps to make that happen. Things like filing bugs on issues in Firefox that are blocking it working and contacting Mozilla about those issues directly via the dedicated coordination mailing list we have set up for issues like this. None of those things happend with Inbox. There were no bug reports filed, no mention of issues getting it to work, nothing. So this was a pure business decision to not put any particular effort into making Inbox work in Firefox. Now you might say that simply writing to standards should make it work in Firefox and if it doesn't that's a problem with Firefox, and I agree. But in my experience "writing to standards" doesn't really describe Google properties very well, especially when they try to push the envelope where standards don't exist yet.