The problem is because version 72.0.0.2 Start process firefox, then firefox process starts other one firefox.exe and first process close!

earlier versions starts and end with same process. If you close firefox, the last process will same as a first.

Firefox fervently tries to be incompatible.

This is possibly done by the launcher process noticing that you start Firefox as administrator and it closes Firefox and restarts with medium-integrity.

• https://support.mozilla.org/en-US/kb/windows-administrator-launcher-process-error-fix

cor-el said

This is possibly done by the launcher process noticing that you start Firefox as administrator and it closes Firefox and restarts with medium-integrity.

• https://support.mozilla.org/en-US/kb/windows-administrator-launcher-process-error-fix

Thank you, but no I don`t run process as administrator. It is not administrator (just regular user) and UAC is enabled.

Please, look at the screens. When I start firefox it is ID 1172, in the middle firefox start more processes and close first one but other processes runs until I close them.

UE-V see that 1172 closed and begin upload profile to server. I tried "C:\Program Files\Mozilla Firefox\firefox.exe" -no-deelevate

There were no problems with version 71. Because firefox start with ID XXXX, runs other firefox.exe processes and if I close it, the last process firefox.exe is will be XXXX UE-V stop XXXX process with upload profile.

cor-el said

This is possibly done by the launcher process noticing that you start Firefox as administrator and it closes Firefox and restarts with medium-integrity.

• https://support.mozilla.org/en-US/kb/windows-administrator-launcher-process-error-fix

I think UE-V start firefox process with height privileges. But I can`t it deny :)

hmm, if I disable ue-v - nothing changes. First process close in the middle.

It is quite normal to see more Firefox processes running.

• one process for the main Firefox thread (user interface)
• one or more content processes, see:
  Options/Preferences -> General -> Performance
  remove checkmark: [ ] "Use recommended performance settings"
• one process for the compositor thread
• one process for the WebRender when this feature is enabled

You can find the current multi-process state on the Troubleshooting Information page (about:support).

• "Help -> Troubleshooting Information" -> "Application Basics":
  Multiprocess Windows
  Remote Processes

See also the Remote Processes section further down for more detail.

See also the Firefox Task Manager (about:performance) and about:memory pages.

• https://support.mozilla.org/en-US/kb/task-manager-tabs-or-extensions-are-slowing-firefox
• https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-or-cpu-resources

cor-el said

It is quite normal to see more Firefox processes running.

• one process for the main Firefox thread (user interface)
• one or more content processes, see:
  Options/Preferences -> General -> Performance
  remove checkmark: [ ] "Use recommended performance settings"
• one process for the compositor thread
• one process for the WebRender when this feature is enabled

You can find the current multi-process state on the Troubleshooting Information page (about:support).

• "Help -> Troubleshooting Information" -> "Application Basics":
  Multiprocess Windows
  Remote Processes

See also the Remote Processes section further down for more detail. See also the Firefox Task Manager (about:performance) and about:memory pages.

• https://support.mozilla.org/en-US/kb/task-manager-tabs-or-extensions-are-slowing-firefox
• https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-or-cpu-resources

The problem is not that friefox starts many processes. The problem is that with the 72 version, something has changed. The first process starts other processes in a different way.