Ok, that lasted all of an hour. Deepest Sender works great. Mozilla did not. Shortly after installing a few extensions, it started refusing to run except from a root shell. So, here I am, back with Firefox/bird.
Does anyone know the solution to this suddenly can't-type-in-text-box bug that comes up in these browsers? It seems to be happening more and more often in Firebird. I used to just move the window to another workspace and then back again, or shade and unshade the window, and I would be able to type again. But now none of my previous tricks work, and I'm forced to restart the browser.