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I have brought my computer from Indiana to Florida and now I can not use gmail. It says cookie mismatch, but I have did all that it said to fix it.

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I can load aol, facebook but unable to open gmail. I have deleted cookies and history.

I can load aol, facebook but unable to open gmail. I have deleted cookies and history.

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As an experiment, try opening Gmail in a private window. Private windows use a separate set of "this session only" cookies so any cookies you still have should not be a factor.

To open a new private window, either:

  • Ctrl+Shift+p
  • orange Firefox button (or File menu) > New Private Window

Does Gmail working normally in that window?

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It is possible that the cookies.sqlite file that stores the cookies is corrupted if clearing cookies doesn't work.

Rename (or delete) cookies.sqlite (cookies.sqlite.old) and delete other present cookies files like cookies.sqlite-journal in the Firefox profile folder in case the file cookies.sqlite got corrupted.