Can you be more specific about what "not working" means?

Can you edit them? Are they misformatted? What did you intend to do but could not?

Are you able to post a screenshot of the malfunction?

when i am having keypress event on textbox that will have problem. it miss some alphabates while typing.

Does this issue occur on all websites for Firefox, or just some websites?

Can you give an example of a website (exact link, if possible) where the issue occurs?

When you press a key, is there any character rendered at all, or just a wrong character?