> ...meanwhile we still can't use "pinch to zoom" (trackpad) in Firefox, which is available in Safari and Chrome for like 5 years now. Such a basic feature! It's the main reason i personally stopped using Firefox.

http://hints.macworld.com/article.php?story=2011032210281240...

I assume you're on a mac since you mention Safari? I don't have a mac. Please give it a try with the latest nightly. It should loom something like https://i.imgur.com/2EgjCIO.png

The article says this feature depends on support from your hardware.

Of course, in the typical Mozilla fashion there is a six year old bug that seems related https://bugzilla.mozilla.org/show_bug.cgi?id=632733

I don't know what to say. Sigh.