I just declared Chrome bankruptcy and switched to Firefox a few weeks ago. CPU rarely goes over 10% on my 2017 MBP. With Chrome it was almost always above 50%.
I swapped when the new FF came out. Was sick of chrome using 3–4gb of memory and bringing my computer to a grinding vault. 3 times the number of tabs in Firefox and I have 0 issues. I recommend FF now.
I used Firefox for a couple of years for the same reason, but the new release broke my keyboard shortcuts and VimFx plugin. Now I use opera and cVim, it's even better. Much faster to start than chrome, shortcuts work, syncing works, vim works, developer tools are great, no bloated background services and square tabs!
I faced the same problem with new FF. Although not as great as Vim-Fx, saka-key does solve the problem to some extent.
Tridactyl works fine in FF. (Vim add-on)
I got a recent Great Suspender update that blew away my settings for the plugin. Did this happen to you too? It made me sad.
Yeah that got me too. Small price, although, i'm tempted to switch to firefox after reading comments here.