We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash.

1. Enter about:crashes in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below.
2. Copy the 5 most recent Report IDs that start with bp- and then go back to your forum question and paste that into the "Post a Reply" box. (Please don't take a screenshot of your crashes, just copy and paste the ID's. The below image is just an example of what your Firefox screen should look like)

Thank you for your help!

More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

This could be a problem with the font that is used for Arabic.

You can try different default fonts and temporarily disable website fonts to test the selected default font.

• Tools > Options > Content : Fonts & Colors > Advanced
• [ ] "Allow pages to choose their own fonts, instead of my selections above"

You can try to disable hardware acceleration in Firefox.

• Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"

You need to close and restart Firefox after toggling this setting.

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
• https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

I only have these:

I have tried this solution but still it crashes !

If crash reports do not have a "bp-" prefix then you can click each of them on the about:crashes page to submit them to the Mozilla crash server.

After I clicked on each ID to submit it, they are converted to other IDs which start with "b".

That looks like crashes with the Shockwave Flash plugin.

• bp-701cf7b8-c169-40c1-ac87-03cd42140823
• bp-ba5fb9d3-ce9b-4b0f-a331-18cb42140823

You can check for problems with current Shockwave Flash plugin versions and try this:

• check for updates for your graphics drive drivers
  https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
• disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)
• disable hardware acceleration in the Flash plugin

See also:

• http://kb.mozillazine.org/Flash#Troubleshooting

Please post all your crash reports using the instructions above.

I only have those.

Yes !!!! Thank you; the problem was with shockwave. I followed the steps mentioned by "cor-el" and that problem is disappeared.

By the way, Hardware-acceleration need NOT to be disabled for me because when I disabled it, typing was stopping sometimes.