In terms of active development, Google is working on Blink and Apple is still working on WebKit. Every other browser depends on Google and Apple to do the heavy lifting for them.
You missed "Mozilla is still working on Gecko"
Re:IPFS Support in Brave
by SulfurHexaFluri on Wednesday January 20, 2021 @12:15AM
(#25842808)
The fork from blink was so long ago its pretty much irrelevant now. Google likely spends more dev hours on it than apple does on webkit these days.
True, but not relevant to the point, which is that both Apple and Google built their browsers on top of someone else’s work just as Brave is doing.
It took years of shipping Chrome before Google actually forked Blink.
Google had contributed significantly to WebKit before the fork.
https://blog.bitergia.com/2013/02/06/report-on-the-activity-...
It was easy for Apple to deliver Safari, when biggest work was done by Konqueror team...