Thanks for review. Adding support for TST is a feature request that I had for a while (https://github.com/ReDEnergy/SessionSync/issues/43). I understand why it would be so useful and I really want to add support for it but it's not really easy for me to do so. Because I use bookmarks and I store them linearly it's quite problematic to rebuild the TST structure. I might be able to do so using by saving additional information alongside bookmarks but that's no longer possible since WebExtension API. I have some alternative solutions but all of them have a few drawbacks and I'm still pondering on which method to implement since it can happen that by uninstalling the addon to lose everything not saved in bookmarks and that might be pretty bad for the addon. Anyway, I try to add this feature, can't promise how fast I will be able to do so but I definitely want to hurry up with it. Thanks again for your support.