Make browser give a custom made note when re-visiting websites
There are several Firefox extensions that can do this. FloatNotes works well.
1.) Install FloatNotes extension
2.) Restart Firefox
3.) (Optional) Configure settings Tools -> FloatNotes -> Preferences
4.) On any webpage, right-click then Create note...
5.) Type your note, then click outside the note to save
6.) Close the tab/window/firefox
7.) Return to the same page later and the note will be there and in the same spot!
If you prefer Chrome, then Note Anywhere is a good choice.
1.) Install Note Anywhere
2.) Select note button to create a new note
3.) Type your note, then click outside the note to save
4.) Close the tab/window/chrome
5.) Return to the same page later and the note will be there
Bonus:
In addition to saving notes it might also be useful to know if you've visited a link and how long ago you did (uses your history).
1.) Install Link Status Redux
2.) Restart Firefox
3.) Hover over a visited link