[grzm]

You can effectively bookmark submissions by using the "favorite" link or just upvoting. The submission will show up in your profile under "favorite submissions" or "upvoted submissions", respectively.

[the_duke]

In addition, I hear that modern browsers support a ground-breaking functionality called "Bookmarks".

[iamcreasy]

I would not rely on browse bookmarks too much. Recently I lost a large amount of bookmarks for google chrome sync overwriting my local copy. The bookmarks.bak file was missing too.

[lalaithion]

To be fair, many modern social media sites break bookmarks.