I have not installed the plugin so far in my firefox and still have not used any additional js script, but I do not know where this one content_script.jswas included and prints unnecessary messages in the console as follows:
content script runtime.onMessage: update_shortcuts
content_script.js (line 91)
<System>
2 content script runtime.onMessage: tabupdate
content_script.js (line 91)
<System>
When I tried to look at the path to this script, it will show its firefox part of any plugin:

resource: //gre/modules/ExtensionContent.jsm → Mos-extensions: //22d1d103-e4d1-431c-bc5e-e2fe1cd8d902/javascripts/content_script.js
Can someone please tell me what the hell is a script and HOW CAN I DISABLE THIS .. ??
I use these extensions in FireFox:

Any help would be appreciated. !!
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