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when I pull up my website from typing in address bar, why is my business phone number on the top right of the page changing to a differnt number every day?

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So, this only happens when on Firefox. I type in my own website, the second it comes up the phone number in the top right corner of the page is correct for a slit second then before my eyes it changes to a different number...to be fair, this number is going to our business but is not our number and it changes everyday and we own the website, we had it developed and talked with the developer who along with us can find no code on the page to suggest this happen. We are at a loss. It only happens on my home computer.

So, this only happens when on Firefox. I type in my own website, the second it comes up the phone number in the top right corner of the page is correct for a slit second then before my eyes it changes to a different number...to be fair, this number is going to our business but is not our number and it changes everyday and we own the website, we had it developed and talked with the developer who along with us can find no code on the page to suggest this happen. We are at a loss. It only happens on my home computer.
Attached screenshots

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Hi watkinskaren, it's quite suspicious, isn't it!

Could you test in Firefox's Safe Mode? In Safe Mode, Firefox temporarily deactivates extensions, hardware acceleration, 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.

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

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