In Firefox, I have a local (i.e. on my harddisk) javascript program (started by a local html and using a local css) that reads info from local csv and json files, it plays audio and video from my local drive and shows several tags from said media files, using jsmediatags.min.js (https://github.com/aadsm/jsmediatags)

To be able to use mentioned files on this local drive, I had to set the following via about:config in Firefox:
content.cors.disable set to true
security.fileuri.strict_origin_policy set to false

All was working wonderful until a few days ago, when Firefox 125.0.3 (64-bit) installed itself.

Since then the mediatags are not shown anymore, the jsmediatags error being: “Generic XHR error, check xhr object.“
When I run above mentioned program from the webserver, all is OK, no errors.

Does this mean something in jsmediatags has to be changed, or is there a setting in Firefox’ config that I have to change so that I can run it locally, and if so, which one ?

Thank you very much.

Already searched the web, and Firefox website for this problem, but didn’t find anything yet.