As a Firefox user, I will give it a try on desktop and android. But can anybody maybe tell what are the limitations in daily real world use, if any?
I wrote a more extensive post on my blog, fwiw: https://whatshouldyoueat.com/2020/08/15/mozilla-ideals/
But the reality of 2020 is that Firefox might not exist in the near future because so few people actually use it. Splitting the user base further into a Mozilla-free version accomplishes almost nothing except helping ensure that that Chrome-only future comes to pass.
If having Pocket and VPN features bundled with Firefox helps keep Firefox around for the long term, that's a concession I wish we were all willing to make.
There is also Seamonkey[1].