Here's another useful tool for bloggers (blogspot) specially if you edit your own layout or background images. It simply hides/shows those quick edit icons on the bottom right side of every page element of your blog. I've been using this for quite some time now with Google Chrome cause this was originally a bookmarklet plugin for Chrome. I tried it with FireFox last night and it worked.
To install just drag this hideqetool to your bookmarks bar..