is it possible to open and focus a blank page at browser startup? I want to avoid loading a heavy website during the startup.

If that's possible, I will put 5 stars.

I really like the concept, but lately it seems to not open all my pinned tabs - or it simply opens the last two multiple times.

Works well, except it keeps adding and increasing the number of the same tabs each time the browser is opened. It should monitor the addresses of the existing pinned tabs. If this is fixed, it deserves 5 stars.

Dear Alix,

the add-on duplicates some of the open tabs. It looks like you check for the open tabs by comparing addresses. What you should do is to compare only the domains.

For example, if Firefox Session manager saves the tab with the following URI:
https://mail.google.com/mail/u/0/?fs=1&source=atom#all/FQfcgxwFbnrMMLgHMKHLZVJJtBswx

StartupApps checks it against:
https://mail.google.com/mail/u/0/#inbox

and opens a new tab, which is not what we want.

Thank you in advance,
Peter

Does what it says but it would be more useful if it would first check, if these URLs are not already opened in pinned tabs. Usually Firefox will restore pinned tabs, unfortunately not always. Here this extension could be a great help but right now it will often lead to double pinned tabs.