What’s the alternative? Using an Android phone with all of Google’s surveillance? A windows laptop with bad battery life, bloatware, and Microsoft’s increasingly bad dark pattern abuse? I feel like no matter what, consumers are screwed.
Graphene is right if you're afraid someone is trying to hack your phone with an RCE in some form of drive-by exploit to hijack your browser.
While RCE attacks and Firefox 0days do exist, I think the privacy improvements outweighs the anti-exploit benefits provided extra layers of sandboxing.
That said, Firefox does seem to be rolling out Fission on Android, which brings hope that site isolation may come soon so that we can have both benefits at the same time.
How's Librem as a daily driver? Battery life, camera, reception/calls etc? I'm eager to get a proper Linux phone, but got burned by the awful performance of Pinephone.
Librem 5 is much more performant than Pinephone, however JS-heavy websites are not very usable. NoScript is the solution. Here is a couple of good review with which I agree: