That’s the biggest problem. I used to use a suspension service for Chrome that would change your open links to its own format when a tab was suspended. I bookmarked hundreds of links in their format over the years.
The service was bought out by a third party, then sold to a scammer, leading to it getting banned by Google.
I’ve now got hundreds of links that are obfuscated, and the only way to get them back is to manually edit them and see which ones are important.