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How do I stop an x mark pop up upon opening Firefox?

alex333
alex333
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When I log on to Firefox an X mark registration pop up appears. I can't stop this pop up from appearing. I need to know how to stop it.

Thanks.

When I log on to Firefox an '''''X mark''''' registration pop up appears. I can't stop this pop up from appearing. I need to know how to stop it. Thanks.

All Replies (1)

the-edmeister
the-edmeister
  • Moderator
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Disable the Xmarks extension??