I used to have issues with Firefox randomly nuking my state on load and having to restore backups, but now I use Tab Session Manager for that and never think twice about it.
You choose to do it so I assume it works for you. What benefit does this give you over the more traditional bookmarking, etc?
The benefit is that I went from thousands of bookmarks, which were difficult and time-consuming to organize and navigate, to contextual pages each filling specific roles and containing ephemeral links to what I need. It works very well for my ADHD and allows me to basically have a messy desk across several domains and contexts, while still having file cabinets for things I do want organized and stashed away.
This has let me vastly simplify my bookmarks, which I typically arrange as unlabeled favicons ordered by color on my bookmarks toolbar, with some others stashed away in a folder.
I keep what I really need, and I'm always ready to drop things I don't need, and it helps me keep a better long-term working memory of ongoing tasks, interests and hobbies.