some examples, por favor?

Vivaldi?

Vivaldi is (a) new; (b) based on Chromium; and (c) not actually open source. (I use both Vivaldi and Firefox, but not Chrome.)

Historically, Firefox has been the main user-entered browser, but not the only one. Especially if you include forks.

Vivaldi also shares a design lineage with Opera 12 and previous, in terms of who the designers are/were. When we lost Opera, I think we lost the open web in a lot of ways. As much as Opera was a closed-source proprietary engine etc. browser, it stood out against the background of the larger Web giants. When they folded and gave in to Google, I was horrified.

Still, the loss of a Community Firefox is a bad thing.

elinks?