hello eric_93, from the crash report you've submitted it seems like the crash might be adware/malware related. the file on your pc causing the crash is named ''datamngr.dll''. first, please go to the windows control panel / programs section and see if you have any toolbars, imesh, MediaBar, data manager or other similar suspicious programs installed - if so remove them... afterwards please run a full scan of your system with different tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes], [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner] & [http://www.microsoft.com/security/scanner/default.aspx microsoft safety scanner]. for some general info see [[Troubleshoot Firefox issues caused by malware]]

Thank you very much ... it really help !!! Very thank youuu