Rather than reloading each tab, one by one, wouldn’t you like to reload all your Firefox tabs at once? Okay, I realize this might not be a need for everybody, which makes it a perfect add-on for the browser.
Reload All allows you reload all the tabs in the window at one go. Need to reload most, but not every single tab? It can handle that too. It features a selection tool in case you want to reload a few tabs while leaving out the rest of them.