Works
/^https:\/\/[0-9a-f]{10}\.[0-9a-f]{10}\.com\/[a-f0-9]+\.js/
Does not work
/^https:\/\/[0-9a-f]{10}\.[0-9a-f]{10}\.com\/[a-f0-9]{32}\.js/
the only difference - + and {32} in the end of the regular expression.
Example URL: https://71466a5633.5cd9ca94fb.com/b770e9d613f18f17c779c91ed4148d3c.js
https://regex101.com/r/YL8OD3/1
Real site [NSFW] http://pornzoom.org/index.php?do=feedbacу
Console:
Screenshot

Windows 10 x64
Chrome 135