''locking as a duplicate - https://support.mozilla.org/en-US/questions/936661'' After upgrading to firefox 15, I lose most of the text in websites and firefox itself. The file, etc menu line is blank. If I use alt-F to open the file menu, it's blank except for icons. The icons on the favorites bar have no text with them. Websites show very little text, sometimes if I zoom in a lot, it will show it at one level, but zooming out at all loses it.