Unable to Start Firefox: Entry Point Not Found ... entry point JS_SetCheckObjectAccessCallback could not be located in the dynamic link library js3250.dll

If you have recently updated Mozilla Firefox only to be unable to start Firefox afterward while seeing this error message, "Entry Point Not Found The procedure entry point JS_SetCheckObjectAccessCallback could not be located in the dynamic link library js3250.dll," then try these steps:

  1. Go to C:\program files\mozilla firefox\ and locate js3250.dll and rename it js3250NEW.dll or something along those lines -- the key is just to rename it.
  2. Then, in the same directory, C:\program files\mozilla firefox\, locate js3250.dll.Mozilla.Backup and rename it js3250.dl.
  3. Restart Firefox.
  4. Click through error box if it appears.
 After those steps, you should be able to resume being able to use Firefox normally.

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