I have 16.0.1 and when I update to 18.0.1 it stays at 16.0.1, any suggestions?

you show 18.0.1 which i downloaded as a .dmg . when I click on it, it looks like it is installing. After a restart I still get 16.0.1 . ANy suggestions.

Make sure that Firefox gets installed properly.
Open the Firefox disk image (DMG) file and drag the Firefox program to the application folder on your hard drive.
You shouldn't double-click the Firefox application to run it from the disk image, but drag it out of the DMG folder instead.
*https://support.mozilla.org/kb/Installing+Firefox+on+Mac
*http://kb.mozillazine.org/Installing_Firefox#Mac_OS_X

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