• Enter about:crashes in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below.
• Copy the 5 most recent Report IDs that start with bp- and paste them into your response here.

Thanks for you help, here it is: bp-467d540c-3cc0-4ca7-883b-c32232140329 bp-ed08639e-e530-4068-bdc3-d36fc2140329 1714e4ea-72bf-4c41-9c58-f6e4a53ef277 bp-5a09c546-d087-42d4-a056-f7adc2140321 bp-04d746a3-2efb-4992-adfe-a7c282140321

Create a new profile as a test to check if your current profile is causing the problems. See "Creating a profile":

• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

Profile Backup and Restore

• http://kb.mozillazine.org/Profile_backup
• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox