Not a Flash person?

... leave it "on" but remove the library, and get rid of it that way; but the Firefox jokers are proud that this is not the case in 2.0.x.) Instead, drop the following in your userChrome.css: #content .notification-inner { display: none !important; } This will, I believe, supress all of those annoying yellow bars. If you use the other ones regularly (the only one that comes to mind off-hand ...