Hello,

Can you share more detail about the issue you're experiencing? Without more detail, there's not much we can do to help.

When posting questions, it's helpful to include information such as your operating system, browser version, specific error messages, and the steps you've taken to try solve the issue. This kind of context allows the community members to provide a more accurate and effective solution.

Looking forward to your update!

You need to show what issues you're having. I had no issue editing a contact. see screenshot What OS? If windows, what security software besides MS Defender are you running? What version of Firefox? Did you try with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#search

Did you clear your browser cache? https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox

I cleared my cache, and it may have solved the problem partly. I have about 1100 contacts, and the message I was getting was "Google Contacts" is slowing down Firefox. Close. Firefox version is: 139.0.4 (64-bit). OS is Windows 10.

Did you try with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#search If you're running Windows Pro version, I would test in the Sandbox to confirm. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/