Facebook blocks Messenger.com for mobile browser user agents; you need to spoof your UA if you want to use it on mobile. (Some of the Facebook app wrappers can do this for you.)
If you spoof the UA, you can also use the main Facebook website on mobile. Messenger.com might be less cluttered though.
Btw: that works with mobile Firefox. (I originally used it instead of chrome, mostly because it supports ad blocking on unrooted devices.)
Interesting, Asana does that too. And I would rather not use their app...
Which ones? Tinfoil doesn't seem to at the moment.
I believe "Metal" does on the Android side, not sure about iOS.