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What's this, when mouse move on a href ?

nourishment
nourishment
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When the mouse move on a href, a samll icon will apear, and if mouse hove on the icon, the href details will be showed. like: https://www.sample.com/.... 

      #Base64
When the mouse move on a href, a samll icon will apear, and if mouse hove on the icon, the href details will be showed. like: https://www.sample.com/.... #Base64

All Replies (4)

nourishment
nourishment Question owner
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here is the screenshot.

nourishment
nourishment Question owner
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how to close this function?

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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Firefox doesn't do this by default, so this feature is added by an extension or theme.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window
nourishment
nourishment Question owner
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Yes, thanks. With the methods on https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#w_the-problem-does-not-occur-in-safe-mode, I got the root cause: extension "Redirect Bypasser".