firefox stops responding and shuts down when doing any type search,why

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options) key, and then starting Firefox. Is the problem still there?

What is your search engine?

Does Firefox shut down, or crash?

Some of your crash reports weren’t sent to the Mozilla Servers.

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers/letters, click it and select Submit.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

the problem was still there even in safe mode.

my search engine is ask.

• 1 Download Firefox Full Installer For All languages And Systemsv39 {web link}
• 2 Uninstall Firefox from your computer {web link}
  DO NOT remove your profiles.
• 3 After, reboot the computer. Then run the full installer.

problem is still there even after reinstalling firefox.

What about other search engines, any problem with them?

Have you tried going to Ask.com to do a search? Any problem?