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Having great difficulty loading sites that I previousl had no problem with. Error message is "Secure Connection failed- incorrect message authentication code"

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Since I converted to Mozilla I have been unable to pull up websites like Pay.gov or USPS or MyDish among others & problem is very consistent. Never had any issues with IE8. Also when I'm already active in a website the page expires when trying to navigate in task bar. Is weird stuff man!

Since I converted to Mozilla I have been unable to pull up websites like Pay.gov or USPS or MyDish among others & problem is very consistent. Never had any issues with IE8. Also when I'm already active in a website the page expires when trying to navigate in task bar. Is weird stuff man!

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That's a somewhat obscure error. Past solutions may have included (sometimes it's hard to tell which suggestion helped):

  • Disabling Firefox from using IPv6 (see that topic in: Firefox can't load websites but other browsers can)
  • Checking for a proxy setting in the Options dialog: "3-bar" menu button (or Tools menu) > Options > Advanced > Network mini-tab > "Settings" button -- try "No Proxy"
  • Fixing a flaky internet connection
  • Removing some extensions (e.g., MaskMe and an old version of DoNotTrackMe)
  • Not using NetNanny