Hello RosieA, please see : Disable or remove Add-ons

if you have problem : Cannot remove an add-on (extension or theme)

analytical info : http://kb.mozillazine.org/Uninstalling_extensions

for your crashes, 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 those IDs into the "Post a Reply" box.

Note: If a recent Report ID does not start with bp- click on it to submit the report.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. 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.

bp-a4e6ae65-f114-4543-a415-743222150526 26/05/2015 09:02 26384485-51B1-4CCA-A115-562FA048613A 26/05/2015 09:01 bp-2e717526-8cff-4625-9c6d-0c9692150526 26/05/2015 08:46 3F90CDFD-3B30-4C9C-A6EA-DBEFD6865D1F 26/05/2015 08:45 bp-8b02b361-4f66-4ecb-90d0-967992150526 26/05/2015 08:45

Hi

Hope these help

Thanks

I notice mention of Rapport in your report's crashing threads, and a web search picked up mention of banking in relation to libidprimepkcs11.dylib

Do you use Trusteer Rapport ?

If so ensure it is fully up to date. If that fails try disabling it

Try to update or uninstall and reinstall Trusteer Rapport and if that doesn't help then disable/stop the program for now.

• Start Menu > Programs > Trusteer Rapport > Stop Rapport
• Mac:System Preferences -> Other -> Rapport -> Stop Rapport

{ from /questions/1061312 )

The Trusteer support for both bank customers and enterprise appears now to be run by IBM, and I am not sure it now has a public forum for end users.

• Support http://www.trusteer.com/support
• Downloads http://www.trusteer.com/download-trusteer-rapport

P.S. for forum cross referencing purposes

• Reports for your CrashIDs
  bp-a4e6ae65-f114-4543-a415-743222150526
  bp-2e717526-8cff-4625-9c6d-0c9692150526
  bp-8b02b361-4f66-4ecb-90d0-967992150526
• Crash Signature: libidprimepkcs11.dylib@0xb652b

Download the current full installer for your Rapport and save it.

Remove Rapport from your computer. Reboot.

Do Not install Rapport at this time. Are there any problems?