If you don’t organize your Internet bookmarks you soon will have a jungle in your browser making it difficult to manage. On one hand you have the links of websites you visit regularly, which you should organize in a proper folder hierarchy. But on the other hand there also are many links we just save spontaneously because we find them interesting and might want to come back.
I propose having a folder in your browser called “temporary” or “delete me” to bookmark such URLs. It is a folder which you review from time to time and then decide if you delete, keep or move the bookmark to your folders with regularly used websites.