Agree. I disliked the tab design of Australis (but remember being able to remove that curved nonsense) but Photon was great (until they started to mess with url bar dimensions etc).
I've just learned about Proton being distinct from Photon.
Of all the names they could've used, they chose one that's one Levenshtein distance from the previous. Looking forward to the next redesign dubbed Protan.
Damn do I hate Proton.