I have an idea for new feature, let's call is "bookmark-reminder". I noticed that whenever I add bookmark, usually I want to return to this page with some specific reason in some specific time; for example to check on the responses in a forum thread in 1-2 days; or maybe check the status of an order placed in web store. But the problem is to remember it - when you participate in many forums, and visit many places, you forget about some you wanted to revisit. This gives an idea: it would be very useful to specify follow-up date along with the bookmark, and have Firefox somehow flash a reminder when the time comes. Seeing the reminder, the user probably would go to the bookmarked location, or postpone the reminder for future time. This would be similar to how Outlook shows follow-ups: you can then dismiss or postpone on future time.
Further, I think most bookmarks have limited lifespan. Using the example of forum discussion, probably in 1-2 weeks it will become irrelevant. Accordingly, it would be useful to easily remove the bookmark when further reminder is not necessary - an option like "don't remind any more, and remove the bookmark" would work.
I think most bookmarks are like these. The sites that I simply visit on regular basis, I don't make them bookmarks - instead, I start typing the address, and once it's instantly autocompleted, I press enter. This takes less milliseconds than going for bookmark. Or I have a shortcut on the desktop.
