Firefox does both of the things you say it doesn't do[1][2]. Also, it's strange that you had "literally nothing" to watch on TV because casting your browser couldn't be mirrored onto the TV... what about Netflix, Hulu, etc.?

1. https://support.mozilla.org/en-US/kb/how-do-i-set-up-firefox...

2. https://support.mozilla.org/en-US/kb/use-firefox-android-sen...

Assuming I'm reading the parent post correctly, neither of those links actually do what they would've been hoping for when moving browsers, even if they certainly get closer than nothing.

Firefox Sync only syncs with versions of Firefox, and Chrome's sync only syncs with versions of Chrome, so they'd have to switch mobile browsers too just because they switched desktop browser (and unlike on desktop, I've found Firefox for Android to generally be clunkier to use than Chrome for Android).

And that second link is about Chromecasting from Firefox for Android, not the desktop browser. Being able to send stuff from desktop Chrome is definitely a convenience someone could get accustomed to.

I own an iPhone and there's NO firefox on iOS. The benefits of having synced history across every browser I use is pretty useful(Ex: that restaurant I looked up online on my laptop this morning is going to show up pretty quickly on my phone because it's in my Chrome history)

Also, Chromecast is just amazing. It works with Netflix, Hulu, YouTube etc. Browse for videos on the website, because it's usually easier to click than to do weird controller motions => chromecast. Back to coding. DONE.

I have no hard numbers or evidence for performance, but that was just my feeling.

Of course you'd have to switch mobile browsers, since mobile browsers don't currently have the option of installing extensions that would allow cross-browser syncing.

That may be a deal-breaker for you at the moment, but I believe that when Firefox's rendering engine switches to Servo, it's going to blow Chrome away on both desktop and mobile.