Telling you what time it is seems like a trivial task for any modern browser, however many leave the job to your operating system.
However, if you have hidden your clocks and need a way to tell what time it is from Firefox, Statusbar Date is the perfect add-on for the job.

Sometimes the simplest solutions are the best.  The FoxClocks add-on for Firefox allows you keep an eye on the time around the world – or just your local time – by putting small clocks in your statusbar.
This has been one of Mozilla’s favorite featured extensions for some time, due to the fact that well… people like to know what time it is?
Here is a little more about FoxClocks from the developer:
You can set each clock’s colour, or even have [...]

Right now I use my “downloads” folder as a catch all for all the things (audio, video, pictures and more) that I download from the Web.  From there I sort it out to where it needs to go.  If you want to add a few more favorite locations to save to from Firefox you can do so with the FavLoc addon.
FavLoc (short for favorite location) will let you set certain folders as favorite locations to easily download files to.  [...]

Sitting at the keyboard for hours on end, it is really easy to get off task, get distracted and get to where you forget to check what time it is and what time you started.  Thankfully the TimeTracker extension for Firefox helps you keep track of how much time you browse.
Some of the features of this awesome addition to any Firefox install include:

Tracks browsing time across sessions
Pauses automatically when you stop browsing
Reset counter
Pause toggle per window
List ‘work’ sites that [...]

Want to raise your productivity, but can not drag yourself away from the time sucking Web sites you like to visit on the Web? Do you spend more time customizing your MySpace page than working on that pile of articles you should be writing? We have all found ourselves having our time leeched away – and now we can do something about it.
LeechBlock helps you gain control back by allowing you to block certain Web sites that suck [...]

Firefox 2 is coming along really nicely. I just downloaded the RC1 yesterday, and things are looking about as good as they can get. I could see how this newest version would help people get things done a lot faster than in the past as well. Need a good example of this in action? I found one over at CMSReport.com.
Over the past few months I found that Firefox 2 is a browser that has change my [...]

Are you keeping tabs on a Web site that you are expecting to change? The ReloadEvery Firefox extension gives you the ability to set a time interval for reloading a Web site. Now you can stalk the Web site of your choice automatically. Give the reload button a rest and try this extension out!
[Learn More About ReloadEvery!]