An extension to disable F12 opening the dev console.
Disable F12 Extension
The screenshot clearly shows that there is no developer console even after pressing F12. ;)
Source Manifest.json
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User reviews
Alicja WD (ID: 000000065cf49733) Voted 5 ★ - Updated 03/26/2023
Dale Sorenson (ID: 000000e8dbc2e12f) Voted 2 ★ - Updated 12/30/2022
Owen Porter (ID: 00000005bd87094b) Voted 1 ★ - Updated 11/08/2022
Grzegorz Redlarski (ID: 000000ec4e517135) Voted 1 ★ - Updated 11/04/2022
A. V. K. (ID: 000000efb66aa241) Voted 2 ★ - Updated 07/01/2022