1) firefox not opening any websites after updating 2) internet explorer is opening all websites properly 3) If we open the firefox and try's to close it, it show that it has closed the firefox window from the screen but actually it has not closed. its process is still running and I am unable end task its processes. When firefox process is running, we cannot open another session also and if we try to open another session of firefox then it gives us error message "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." 4) After trying to kill the firefox process from taskbar and if we try to open another session of firefox, it also gives error message "Your Firefox profile cannot be loaded. It may be missing or inaccessible" 5) The only solution to close the firefox process is to restart the Computer. 6) I have tried FAQ's from your websites but after that also it not opening any website I have used below website link and settings as shown. --reset firefox https://support.mozilla.org/en-US/kb/how-reset-default-user-agent-firefox --referesh firefox https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings --add / delete profile https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles "C:\Program Files\Mozilla Firefox\firefox.exe" -p set network settings to "No Proxy" about:config ---search following and set it to true network.dns.disableIPv6 network.dns.disablePrefetch https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors#w_the-problem-only-happens-in-firefox https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware 7) Please tell how this problem of websites not opening in firefox browser can be solved. Thanks & Regards, Samuel Motghare Nagpur, India _{edit: removed personal information for your protection. please note that we cannot offer support via telephone, so please continue in the forum. thanks for your understanding! (philipp)}