I found that the bug happens only, when Firefox is configured to use my intranet automatic proxy configuration URL. If I use a direct proxy, the bug disappears.
Apparently the problem is about slow parsing the complex proxy configuration script or with waiting until the new script version is downloaded
I found that the bug happens only, when Firefox is configured to use my intranet automatic proxy configuration URL. If I use a direct proxy, the bug disappears.
Apparently the problem is about slow parsing the complex proxy configuration script or with waiting until the new script version is downloaded