Content_scripts#!s!Note%20that%20content%20scripts%20are%20currently%20blocked%20on%20addons.mozilla.org.%20If%20you%20try%20to%20inject%20a%20content%20script%20into%20a%20page%20in%20this%20domain,%20it%20will%20fail%20and%20the%20page%20will%20log%20a%20CSP%20error.

Please use caution when installing third-party add-ons. If you are immediately prompted to install an add-on, please let us know