Problematic plugin prevents browser from startingĭepending on your browser version and OS, Firefox or SeaMonkey may hang, crash, or simply fail to start because of a problematic plugin. See the Profile cannot be loaded article for more information. (or similar SeaMonkey message): This message appears when the profile folder referenced in the profiles.ini file cannot be located. Your Firefox profile cannot be loaded.If not, see the Profile in use article for further instructions. In the above examples, ending the browser process or restarting the system will normally unlock the profile. Only one copy of Firefox can be open at a time.' To open a new window, you must first close the existing Firefox process, or restart your system.' 'Firefox is already running, but is not responding.Close Firefox or Close SeaMonkey message box with one of these messages (using Firefox as an example):.

Profile in Use: The Profile Manager appears along with a message that the selected profile is already 'in use' when you attempt to start your Mozilla browser.

One of the following messages can appear when you start your Mozilla browser if the profile is either 'locked' or inaccessible:

8.4 Firefox 3 does not start on Mac OS X 10.3.9 or below.

8.3 Firefox 4 or above does not start on Mac OS X 10.4 or PPC Mac OS X 10.5.

8.2 Unable to reopen Firefox on Mac OS X after installing and closing it.

8.1 Firefox won't run on Mac OS X when home folder is on a network share.

7.3 '/lib/i686/libc.so.6: version 'GLIBC_2.3' not found required by //firefox/'.

6.5 'Error opening file for writing.' on Vista.

6.4 Application fails to start because js3250.dll or other program files are missing.

6.3 Firefox does not start when System Mechanic is installed.

5.5 Procedure entry point js_SaveRegExpStatics error in js3250.dll after updating Firefox.

5.4 'The program must close to allow a previous installation attempt to complete.5.3 Computer must be restarted message after Firefox upgrade.5.2 Firefox does not start after updating with ZoneAlarm ForceField enabled.5 Startup issues after a Software Update.4 Problematic plugin prevents browser from starting.3 Problematic extension or hardware acceleration prevents browser from starting.

1 Browser process from previous session did not exit.

Why is mozilla firefox not responding