You're not describing how a tiling WM fails to satisfy your needs. My guess is you're unhappy with toolbars being repeated in each tile, is that it? If so, I believe Suckless's striped-down browser is the closest, together with a tiling WM.
If code editors are indicative, yes some power users tend to like a tiling window manager bundled in the app. So you may be right but I think it's out of scope for Firefox which targets the masses and it's definitely off-topic here.
If code editors are indicative, yes some power users tend to like a tiling window manager bundled in the app. So you may be right but I think it's out of scope for Firefox which targets the masses and it's definitely off-topic here.