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When i try to open my firefox a box pops up saying Error: Platform version '1.9.2.17 is not compatible with minVersion>=1.9.2.18 maxVersion <=1.9.2.18

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It won't let me open firefox so i cant go online. the rest of the computer is working fine. at the top of the box it says XULRunner

It won't let me open firefox so i cant go online. the rest of the computer is working fine. at the top of the box it says XULRunner

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The updater wasn't able to update all the files and some were left as older versions.
Do a clean reinstall.

Download a new copy of the Firefox program and save the DMG file to the desktop

  • Trash the current Firefox application to do a clean (re-)install
  • Install the new version that you have downloaded

Your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks and other personal data.