I used to store bookmarks in the browser. But they wouldn't survive changing the browser, upgrading the browser, reinstalling the operating system, or moving to another device. Besides, I didn't really want to share my bookmarks with the browser vendor, every browser app vendor, and random web sites.

Now I just store them in a .txt file. My text editor recognizes URLs and I can just click on them. Matching { } is also supported, which is all one needs for a tree-style database.