The reason why I instead just use Firefox's own 'restore previous window/tab" function is because this program can't reopen tabs that contain an opened file that has symbols ä,ö or å in it, it seems. My username on this computer contains the letter ä (I got this computer from someone), and this addon can't open files because of the file path contains ä in the username. I often have pdf files stored on my computer open on Firefox.
