Unfortunately, that button doesn't appear until the site is fully loaded, so if you really want to load YouTube in the app, you sit there staring at your screen for two or three seconds, angry at FF for not just doing what you want and opening the site in the native app. For those of us in rural areas with crap connections, it can be five or ten seconds for Firefox to get to a state that it decides the site is fully loaded and let you leave the app.
I tried using FF on Android for a while. If I saw a page with a link to a YouTube video, the fastest way for me to watch the video was 1) Copy the link to the clipboard. 2) Open Chrome and paste it in 3) Click the link.
Lots of apps are bad actors like this - Facebook, Twitter, etc. In those cases, when you click a link in a post or tweet, you go there in their own built-in browser, trying to keep you in their app. But, they give you the ability to turn it off. It's in the app settings if you look.
Firefox doesn't have this. You have to wait until the page is fully loaded, and then decide if it's worth your trouble to open it in the native app now. Most of the time it isn't, it would have been faster in the native app, but you're there now, so eh. For YouTube, it usually is. But it's just so hair-pullingly frustrating.
I tried using FF on Android for a while. If I saw a page with a link to a YouTube video, the fastest way for me to watch the video was 1) Copy the link to the clipboard. 2) Open Chrome and paste it in 3) Click the link.
Lots of apps are bad actors like this - Facebook, Twitter, etc. In those cases, when you click a link in a post or tweet, you go there in their own built-in browser, trying to keep you in their app. But, they give you the ability to turn it off. It's in the app settings if you look.
Firefox doesn't have this. You have to wait until the page is fully loaded, and then decide if it's worth your trouble to open it in the native app now. Most of the time it isn't, it would have been faster in the native app, but you're there now, so eh. For YouTube, it usually is. But it's just so hair-pullingly frustrating.