On my website, I have a copy of Dolphin (the Wii/GC emulator) which I modified to be compatible with OS X Mavericks. I have updated it a few times to merge in changes from the latest version of upstream Dolphin. At the moment, however, my most recent build is more than a year old.
Have I abandoned it? I legitimately don't know! It's possible that next Saturday, I'll wake up, read about a new Dolphin feature I want to have, and decide to spend the day or weekend working on an update. Alternately, I might not get around to it until next summer, or I'll never update it again, ever. I literally do not know any more information about my future plans than you do.
I'm projecting a bit here, but I assume Bluebox operates in a similar way with Chromium Legacy. He didn't wake up one morning and decide to put it on hold; he has been meaning to get back to it, but hasn't, and maybe he never will. What information could he share that would be helpful?
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If I'm coming across as a little protective of Bluebox, it's because to my knowledge, he has never attempted to publicize Chromium Legacy! The browser has no publicly facing website other than its Github repository, which I found in a random Google search in 2020. At the time, it had zero stars, issues or discussions, and I don't think anyone else knew about it!
I decided to download this mystery browser and try it in a Mountain Lion VM (it didn't work on Mavericks at the time), at which point I realized, holy crap, this thing is the real deal, it actually works, and proceeded to share it with the rest of the world here on MacRumors, Hacker News, and so on.
To my knowledge, Bluebox has never posted outside of Github. He just started making a browser for himself, and then when people started opening Github issues, he did his best to respond. I only have his email address because I sponsored him for a significant amount of money, and he sent an email to thank me for that.
Pretty please, leave him alone. He'll release an update if/when he releases an update.