Hello, Sorry to know about your problem. After seeing your problem, it seems there are some problem in your Firefox profile. Maybe, your addons.jsn file may corrupt. For fixing it, you can try by resetting your firefox.

Please do the following to Reset.

1. Click the menu button , click help and click on Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Let us know if it solves your problem Regards

I am truly sorry, it still doest solve my problem. I did everything as you requested and then repeated.

anything else to be done?

Is it just that one add-on, or all of them? Try another add-on and see if there is a problem. You can always remove it later.

hello, please check that your system's date, time & timezone are set correctly: time.is

Sorry for this. So, I think, you should create a new profile and try to download add ons. For creating new profile, do following.

1. Close Firefox
2. go to run and type "Firefox -p"
3. Then when a small window open, click on "Create profile" and do the next,
4. After creating profile, Try to download the add-ons again.

Let me know if it solves. {note} Note that, in your new profile, your old informations will not available. Fore more information to bring information from old profile to new one, please see this article Recovering important data from an old profile

Regards

no its for all add ons.. I cant seem to install any.. check this link https://www.dropbox.com/s/l8arjedr3q5ov9z/Screenshot%202014-05-17%2012.04.58.png

what should I do? and why does this happen.. my friends who use Firefox arent facing this issue

Dear Philip,

Time and date was the problem!!!!!!!!!!!!!!!!!!!!!! Thank you! everything is fine! moving from crappy chrome to Firefox!