The opposite: CTRL + '''-''' (the minus key). You can also install this add-on: https://addons.mozilla.org/en-US/firefox/addon/default-fullzoom-level/ Incidentally, the version of Firefox you're running at the moment exposes your system to attack. A short while ago, there was a security breach at Comodo which is an SSL certificate provider whereby a number of fraudulent certificates were inadvertently issued. These allow a hacker to impersonate any site including online banking and the Firefox version you're running at the moment will not warn you that the site is a fake. The fraudulent certificates were blacklisted in v3.6.17 and beyond. Click Help | Check For Updates to update to v3.6.19, or download it from here: http://www.mozilla.com/en-US/firefox/all-older.html ---- If this answers your question, please click the '''Solved it''' button next to this post after you log in into the forum. This will help others searching for a solution to the same subject. Thanks.