I am not too sure I understand what you mean when you say the Tabs are all there but the sites cant be seen.

The open all tabs is typically seen in the bookmarks library when you select a folder, that folder obviously must contain tabs if it is to open, are you clicking the correct folder ?

To open the bookmarks library use all three keyboard keys Alt + B + Shift note you can expand folders to see content, and then open individual tabs, try right clicking for the options on folders or individual bookmarks.

See

• how do i use bookmarks?
• bookmark folders

The problem may be that Firefox is trying to open the tabs but not managing to connect or load them, check you have not selected work offline (Firefox button -> web Developer -> work offline).

• see no programs can load websites

Basically I go to the bookmarks option at the top of my screen, point at my folder that has all my tabs/bookmarks and right click it, then i choose the option "open all tabs" in that folder. All the tabs appear but it gets stuck with all my tabs loading (all pages are blank). i thought that my computer was just being slow so i waited, but a whole half hour pasted and the site are still not seen(still loading). i closed that window and tried to see if it would work with another window but the same thing happens.i tried restarting my computer and start the process again but the same thing happens. however when i restart my computer and open a window it show my homepage and i can open new tabs with the plus sign option and open the tabs in my bookmarks folders separately. the problem is it wont open them all at the same time and when i try to start a new window the same thing happen with any site i try to open separately after that its like my browser has a mind of its own. (I've check my internet connection and its fine. and i don't have any viruses at the moment)

Are you taking advantage of the fact that you can create nested sub folders ?

Or are you trying to open all your bookmarks, which could be a very long list.

Do you have a folder with say four bookmarks in it, if not why not try to create one now with any random content, and see if that will then open if you use the open all option.

Also check to see that the new folder is saved ok and does show up again when you restart Firefox. (Otherwise maybe there is a problem with the database file places.sql where firefox stores your bookmarks)

I suggest you immediately back up your bookmarks manually

• see backing up and restoring bookmarks
• also see bookmarks are not saved bookmarks not saved

A possible cause is a problem with the file places.sqlite that stores the bookmarks and the history.

• http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox