Could you clarify what you mean by tables not working or not being usable? As a little test, I started a new document and used Insert > Table and then typed in some text. That seemed to go fine (see attached screenshot). So I need more specific information to try to replicate the problem. ---- More generally, when you have a problem with one particular site that previously worked normally, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site. (1) Clear Firefox's Cache See: [[How to clear the Firefox cache]] If you have a large hard drive, this might take a few minutes. (2) Remove the site's cookies (save any pending work first). While viewing a page on the site, try either: * right-click/Ctrl+click a blank area of the page and choose View Page Info > Security > "View Cookies" * (menu bar) Tools > Page Info > Security > "View Cookies" In the dialog that opens, you can remove the site's cookies individually. Then try reloading the page. Does that help?