/usr/share/xul-ext/autofill-forms/chrome/content/ is in xul-ext-autofill-forms 1.0.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xul-ext/autofill-forms/chrome/content/autofillForms.js
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsOptions.js
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsOptions.xul
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsOverlay.js
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsOverlay.xul
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsRuleEditor.js
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsRuleEditor.xul
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsTagEditor.js
/usr/share/xul-ext/autofill-forms/chrome/content/autofillFormsTagEditor.xul