Hi. I'm sorry that you consider this a bad experience but please understand that your context is way outside of a normal user situation. The addon just tries to save the data into storage and I have no way of configuring how and where that storage goes, it's what the API provides. As regarding the configuration, you have the option to not use the saving at all (disable) or you have the option to change the interval of the saves, there is not really anything left to do, and the timing was set to 15 seconds because most users have a few tabs opened and saving them will not require substantial IO or storage. In your case yes it does not makes sense but that's why you have the options to change. The storage space is just made up of the URL and title of the addon and the icon of the site nothing more, so there's no real overhead that I create other than what it is required for a session.

Please also not that the addon description clearly states that "THIS ADDON IS NOT INTENDED FOR AUTO-SAVING OF SESSIONS!".
Having this in mind, giving a 1 star rating to something that is not intended for your own purposes and in that context of having hundreds of tabs it's a little bit excessive.

Hi. Thanks for the review. Seems that you're not the only one that has this problem. Sadly I don't think there's a solution for it because it doesn't seem to be a problem created by the code from the addon but most probably after a Firefox Update.
See this thread for more info: https://github.com/ReDEnergy/SessionSync/issues/103

As much as I hate the issue, I can't really implement a solution for it because there is nothing wrong with the addon itself. If you try and open the addon view inside the Windows Mode or the Tab Mode you will see that the scrolling works just fine. The issue is related to the Firefox profile you have I believe. Sadly it seems that Firefox updates constantly keep corrupting (for various people) the profile. This might also be a problem created by the same issue. I understand your frustration but there's literately nothing I can do, if the same code works in Tab Mode / Window mode (CTRL + SHIFT + V or CTRL + SHIFT + U) then it means that Firefox somehow broke the Panel mode (and it's not reporting right the information inside). If you would install the addon on a clean profile you will see that everything works as expected.

Thanks for point it out, but unless I can somehow find the issue and investigate more about it, there's nothing I can do. Again, looks like is not a problem of the addon, but I might be able to somehow do things differently to avoid this Issue I will try.

Hi. It's a little hard for me to understand why the complain having in mind that the addon is specifically built for manual saving of sessions AS BOOKMARKS. There's no way that would be automatically because the addon would make firefox unresponsive every 10 seconds otherwise. Saving tens of bookmarks or even hundred is not acceptable for performance reasons. Yes, the addon has another small feature that saves in background everything once ever 15 seconds (or whatever you set), but that's clearly not something full featured and can't be compared with an auto-save session addon. I totally understand that the addon may not be for everyone, but I'm not even trying to promote it to those that want auto-saving :|. The description says that "you can save sessions as bookmarks" not that they are automatically saved.
This addon is intended for those that want control over what and when they want things to be saved and on top of that is made for management using the bookmark system. Don't want to be mean, but I'm not trying to sell the addon as what it's not, so giving it a 1 star for something that is not even suppose to be doing is not really ok.

Hi. Even though you might expect that as a main feature the addon description clearly states that you have to "Save them", at least that's the main reason of the addon. Now, I really don't know how to describe that better. Getting a 2 star rating for not having a feature that I never intended to add is quite odd.

Of course, there is a secondary aspect of the addon, the history tab will constantly save each 15 seconds (or how many you set) your current active session and you can find it there in case the browser crashes.

Of course things might not be exactly what you may expect, but that I can't change. The addon was designed to work with bookmarks and saving the session constantly into bookmarks would have been impossible. The addon main purpose is to be a session management tool, not an auto-saving session (although it does have that as well in the History tab)