What error message are you getting? What happens when you load FF?

What's your computer system and Firefox version?

Please explain the problem in detail. What happens? What is the exact error messages?

Keith Tysinger said

What error message are you getting? What happens when you load FF?

it doesn't boot out. so, i didn't got any error and all

FredMcD said

What's your computer system and Firefox version? Please explain the problem in detail. What happens? What is the exact error messages?

system in 2.0GHz, intel core i3-6006U 4.00GB RAM, 64-bit OS x64 based processor

and all the firefox version are latest

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

FredMcD said

Start Firefox in Safe Mode {web link} A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

---

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

See the problem is you are not getting my problem. I said I can't start firefox then how can I click on the menu button and start it in safe mode, and how can I try safe websites.

as I clickon the firefox icon it just refresh my window screen and that's it nothing open.

You can start Firefox in Safe Mode by holding down the <shift> key while starting Firefox.

Still nothing happened.

Hey bro tell me what to do next

Hi, try temporarily disabling your anti-virus/security software in case an update to something within it is blocking Firefox.

If that doesn't help, try a Clean Reinstall; this means you remove your Firefox program files and then reinstall Firefox. This process does not remove your Firefox profile data (such as bookmarks and passwords), since that information is stored in a different location. With Firefox closed, use another browser to download Firefox from https://www.mozilla.org/en-US/firefox/all/ and save the file to somewhere convenient on your computer.

Now delete the Firefox installation folder which should be in one of the following locations -

Windows: C:\Program Files\Mozilla Firefox C:\Program Files (x86)\Mozilla Firefox Mac: Delete Firefox from the Applications folder.

You can now double click the file you previously downloaded to install Firefox.