(1) Where do you find usage numbers? Both are niche (2) No, the cost of supporting a browser is the cost of supporting that browser's users. Even if the entire

(1) Where do you find usage numbers? Both are niche (2) No, the cost of supporting a browser is the cost of supporting that browser's users. Even if the entirety of the changes required to enable it is simply adding "com.kagi.orion" or some such to a plist, there's a cost to responding to every "it doesn't work here" message. Arc looks to be VC funded so it seems plausible they could have a commercial agreement with 1password, or it's possible that they raised 17 million to make a chrome wrapper and so have exactly chrome's web extension implementation which would reduce support costs to zero (though I do wish someone would give me 17million for some random project :D )