Initially, the problem was reproduced on several machines with Cisco AMP, but today we retested and we have only one machine on which the problem still reproduces. Here, on this machine, the problem is reproduced only on the old ESR78.6.0 build installed on Dec 10, buildID: 20201207224150 ([here](https://drive.google.com/file/d/10YpJYHodZaK4uY8N5r2KNTXILprNmhg6/view) is the omni.ja file for this build). For new installs of ESR78.6.0 on this machine, everything works ok and the Firefox opens correctly. On other machines, we deleted all Mozilla folders from AppData (Local, LocalLow and Roaming), and so the problem does not recur anymore.
Bug 1681745 Comment 6 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Initially, the problem was reproduced on several machines with Cisco AMP, but today we retested and we have only one machine on which the problem still reproduces. Here, on this machine, the problem is reproduced only on the old ESR78.6.0 build installed on Dec 10, buildID: 20201207224150 ([here](https://drive.google.com/file/d/10YpJYHodZaK4uY8N5r2KNTXILprNmhg6/view) is the omni.ja file for this build). For new installs of ESR78.6.0 (or any other build: Release, Nightly) on this machine, everything works ok and the Firefox opens correctly. On other machines, we deleted all Mozilla folders from AppData (Local, LocalLow and Roaming), and so the problem does not recur anymore.