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Firefox 77.0.1 opens links just by moving the mouse pointer over them

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In the last few weeks Firefox 77.0.1 opens links just by moving the mouse pointer over them sometimes. Normally you would click or right-click to open in a new tab but often I am having links just open of on their own. I was on the phone with a vendor navigating their site when I kept ending up on a different page. Did something change with this version? The vendor also said they have been having issues with Firefox the last week or so. Using Windows 7sp1 32bit. Thanks

In the last few weeks Firefox 77.0.1 opens links just by moving the mouse pointer over them sometimes. Normally you would click or right-click to open in a new tab but often I am having links just open of on their own. I was on the phone with a vendor navigating their site when I kept ending up on a different page. Did something change with this version? The vendor also said they have been having issues with Firefox the last week or so. Using Windows 7sp1 32bit. Thanks

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Hi MikeZZ, although sites can run scripts based on running the mouse over an element, they usually don't navigate the page that way (and opening a new window/tab based on mousing over should be prevented by the popup blocker).

Do you have a fancy mouse that may send different signals to applications than the basic two buttons and wheel models?

Could you test in Firefox's Safe Mode? In its Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, any userChrome.css/userContent.css files, and some other advanced features to help you assess whether these are causing the problem.

If Firefox is not running: Hold down the Shift key when starting Firefox. (On Mac, hold down the option/alt key instead of the Shift key.)

If Firefox is running: You can restart Firefox in Safe Mode using either:

  • "3-bar" menu button > "?" Help button > Restart with Add-ons Disabled
  • (menu bar) Help menu > Restart with Add-ons Disabled

and OK the restart.

Both scenarios: A small dialog should appear. Click "Start in Safe Mode" (not Refresh).

Any improvement?