I have now switched off the master password. It cannot be used anymore for the window to enter the master password has started to appear wherever I surf the net. Every new place I want it has my password, though I am not registered on the website I come to. I am waiting for answers how I solve this problem that arose from nowhere for no reason. I have not made any changes to the web browser at all.

Do you use an ad blocker? I had the same problem begin this morning. Some outdated filters in my ad blocker was causing the problem.

No, I do not use any ad blocker. I use: Popup Blocker Ultimate Simple Blocker (blocks inappropriate sites)

I'll try to disable the add-ons.

There is a preference that sets how long the Master Password is unlocked:

http://kb.mozillazine.org/About:config_Entries#Security. Search for; security. ask_for_password and; security.password_lifetime

The security.password_lifetime pref only works in SeaMonkey and doesn't not (and never has) worked in Firefox (a search in the source only comes with the pref setting). In Firefox you need to cancel a MP prompt (e.g. show passwords) to logout.

Are you using Sync? What security software do you have?

Is the Password Manager working properly? Do you get a MP prompt when you inspect the logins?

• Options/Preferences -> Privacy & Security: Logins & Passwords: "Saved Logins" -> "Show Passwords"

You can try to switch on Login debugging and set this pref to true about:config page.

• signon.debug = true

That will create a log in the Browser Console.

• "3-bar" menu button or Tools -> Web Developer
• https://developer.mozilla.org/en-US/Tools/Browser_Console

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

cor-el said

The security.password_lifetime pref only works in SeaMonkey and doesn't not (and never has) worked in Firefox (a search in the source only comes with the pref setting). In Firefox you need to cancel a MP prompt (e.g. show passwords) to logout.

---

Are you using Sync? What security software do you have?

Is the Password Manager working properly? Do you get a MP prompt when you inspect the logins?

• Options/Preferences -> Privacy & Security: Logins & Passwords: "Saved Logins" -> "Show Passwords"

You can try to switch on Login debugging and set this pref to true about:config page.

• signon.debug = true

That will create a log in the Browser Console.

• "3-bar" menu button or Tools -> Web Developer
• https://developer.mozilla.org/en-US/Tools/Browser_Console

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

I'll test your ideas. This just started suddenly, I haven't installed anything or changed anything in settings. There was no update when this problem started. I do not use the master password now because it is difficult that it should be opened every time I surf on a page.

This can possibly also happen with one of the hotfix extensions that are used to add a new intermediate certificate to replace the old expired certificate that is used to sign extension. The MP is required to be able to install this new certificate in the Certificate Manager. You can check the about:studies page and the extensions folder in the profile folder. Once the new certificate is installed, you should no longer need the hotfix extension that installs the new certificate.

You can check in the Certificate Manager whether you have the new intermediate certificate installed. You can find it under the Authorities tab.

• Options/Preferences -> Privacy & Security
  Certificates: View Certificates

Scroll down to see if you can locate this entry:

• Mozilla Corporation: signingca1.addons.mozilla.org

cor-el said

This can possibly also happen with one of the hotfix extensions that are used to add a new intermediate certificate to replace the old expired certificate that is used to sign extension. The MP is required to be able to install this new certificate in the Certificate Manager. You can check the about:studies page and the extensions folder in the profile folder. Once the new certificate is installed, you should no longer need the hotfix extension that installs the new certificate. You can check in the Certificate Manager whether you have the new intermediate certificate installed. You can find it under the Authorities tab.

• Options/Preferences -> Privacy & Security
  Certificates: View Certificates

Scroll down to see if you can locate this entry:

• Mozilla Corporation: signingca1.addons.mozilla.org

Yes, it is in the list!

I now remember that I opened (checked) to install a quick fix for add-ons that suddenly stopped working. It is still checked. Before it was not checked.

Could it be the fault?

A possible cause of the MP prompt at startup can be the hotfix extension to add the new intermediate certificate to the Firefox Certificate Manager. If you have this extension listed on the about:studies page then try to remove it when possible.

If you run Firefox 66.0.5 then you no longer need an extension or other workarounds to install the new certificate, so possibly also check the about:addons page for a (hot)fix extension and remove this extension.

• https://support.mozilla.org/en-US/kb/update-firefox-latest-version

I remove...

hotfix-update-xpi-signing-intermediate-bug-v1.0.3-1548973 This is a hotfix that updates an intermediate certificate used for signing add-ons. It is one of the mechanisms used to fix bug 1548973. This is the second release of the hotfix, it is v1.0.3.

...and my problem is solved!!!

THANKS!