By pure luck I cam across a new service, which is still currently in beta, – My Stickies. Within the first second I realized that it was something that I waited for a long time now.
In essence, My Stickies allows you to attach yellow sticky notes to websites. You can have as many of these notes attached to as many websites as you want. Whenever you come back to the website, you will see all your notes at the same place and of the same size as you left them.
Not only this functionality alone is great news, but there is more. You can even see your notes from a different place. This is great, because you can add notes to sites at home, and than see them later on in the office – no synchronizations are needed.
You can also see all your notes at their website. You can tag them, search them, and use notes as a sort of bookmarks.
Getting all this is easy too. All you have to do is register at My Stickies and install the Firefox extension. The service is free and works exactly as expected. Check it out.