First, could you check a possible plugin issue:

In your "More System Details" one of your plugins has this description "This plug-in enables downloading of Flash videos". Which plugin is that?

Firefox 30 switched most plugins from running any time a site asked for them to requiring your permission to run. You may have noticed this when a bar appears asking whether a site can use a particular plugin. Some plugins meant to run in the background do not work well in this configuration, and you may be able to fix that as follows. Not sure this is your issue but it's worth a try.

Open the Add-ons page using either:

• Ctrl+Shift+a
• "3-bar" menu button (o rTools menu) > Add-ons

In the left column, click Plugins. Then find the one(s) you want to switch and change from "Ask to Activate" to either "Always Activate" or "Never Activate". You may need to exit and start Firefox up again before this takes effect.

When Firefox crashes, it often records details about the cause of the problem. 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.

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

Verzonden crashrapporten Rapport-ID Verzenddatum bp-2fd024bf-821d-4136-ae85-943f02140729 30-7-2014 0:40 9ca8f91c-e52d-43e8-81c4-4d52cf5bba51 28-7-2014 17:16 5c558e09-d5e9-4649-add9-e87cfb9f500b 28-7-2014 1:55 92952250-fbd1-44bd-b6ea-bb9898b0e642 26-7-2014 16:07 20395b1e-1429-4a6f-a692-9549c659c288 25-7-2014 22:46 bp-3d361642-ef84-40bf-b485-86dcd2140725 25-7-2014 20:48 d6c73d13-f15a-4218-bb76-5a5089819adf 24-7-2014 18:28 5a345966-9df5-4080-afae-458b1cf3d5f6 24-7-2014 9:36 57d5c68c-1dc5-459a-9643-4232fec13255 23-7-2014 20:04 e8639103-4577-4bee-a250-af1ff698b689 22-7-2014 0:09 195c4cd3-6038-4d58-8041-9f5f8f7b5f2a 20-7-2014 3:20 cd2ad184-35de-4e85-bfa5-b6d463c61950 19-7-2014 23:43 e30c08b7-f69c-4fbb-8c8a-9eee9797a8f8 19-7-2014 2:56 5bc5605d-4b7d-49a9-8b7d-9c45ff197427 19-7-2014 1:06 c7c96133-0b0d-492b-a9da-d8b26fcdfc3a 18-7-2014 22:42 555cca7e-b764-4bdb-980e-fdc54e76ade7 18-7-2014 19:58 60ff83a4-6f3a-4576-a2a9-4fadf4090508 18-7-2014 17:24 bp-37bec6c9-7ecb-4bf2-94b7-67ff22140718 18-7-2014 4:35 dfa30ce6-2887-4183-a6d0-5b672cd40c9d 14-7-2014 17:31 f441548d-2d4f-4726-b043-f9d215a80175 9-7-2014 17:40 5ec47349-6fa9-4278-b506-da2c1e8c8131 9-7-2014 14:07 866c3165-2bfa-4ea9-a48a-a9812bf0f5ca 7-7-2014 22:58 bp-46daf234-41e3-479c-974f-e25562140704 4-7-2014 20:41 746ce82b-f3a4-4bbd-9677-6c4639a422ad 4-7-2014 8:51 a907fefd-57d4-431b-88c6-45b2e2ae9d88 3-7-2014 22:14

what can i do

There are four reports that were "linkified" in your list:

The most recent relates to Flash. Suggestions further down this thread:

The next two seem related to reading/processing a proxy auto-config (PAC) file. Does that make sense in your configuration?

Could you test in Firefox's Safe Mode? That's a standard diagnostic tool to deactivate extensions and some advanced features of Firefox. More info: Diagnose Firefox issues using Troubleshoot Mode.

You can restart Firefox in Safe Mode using either:

• "3-bar" menu button > "?" button > Restart with Add-ons Disabled
• Help menu > Restart with Add-ons Disabled

Not all add-ons are disabled: Flash and other plugins still run

After Firefox shuts down, a small dialog should appear. Click "Start in Safe Mode" (not Reset).

Any difference?

If the Flash problem persists in Safe Mode, this is some standard guidance that addresses the most common issues with the Flash Player plugin, separate from extensions. I'm sure you've seen some of it before, but just in case:

(1) Disable hardware acceleration in Flash

See this support article from Adobe: http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues

(2) Disable the protected mode feature

You can do this by creating or editing a settings file. The following pages/posts provide different ways to do that:

• Adobe support article under the heading "Last Resort": Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?

• Manual steps: https://support.mozilla.org/questions/968190?page=5#answer-509209

• Batch file to automate the manual steps: https://support.mozilla.org/questions/982093#answer-518078

Flash needs to completely unload from memory (exiting and starting Firefox up again might help) before this takes effect.

easy english please im not that computer prof

I suggest focusing on this part:

Disable the protected mode feature

You can do this by creating or editing a settings file. The following pages/posts provide different ways to do that:

• Adobe support article under the heading "Last Resort": Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?

• Manual steps: https://support.mozilla.org/questions/968190?page=5#answer-509209

• Batch file to automate the manual steps: https://support.mozilla.org/questions/982093#answer-518078

Flash needs to completely unload from memory (exiting and starting Firefox up again might help) before this takes effect.