Real Firefox power users should know that if they want to hack a website, they can
1) write an user script and load it into Violentmonkey, or CSS and load into Stylus. You can easily distribute some Javascript/CSS text via email or IM.
2) If user script or CSS not enough, you can write an addon, create a free Firefox account, submit the addon to your own account at https://addons.mozilla.org/en-US/developers/addon/submit/agr... and download the signed addon XPI file. Then you can distribute the file in whatever way you want, provided you are not violating any license agreement.
1) write an user script and load it into Violentmonkey, or CSS and load into Stylus. You can easily distribute some Javascript/CSS text via email or IM.
2) If user script or CSS not enough, you can write an addon, create a free Firefox account, submit the addon to your own account at https://addons.mozilla.org/en-US/developers/addon/submit/agr... and download the signed addon XPI file. Then you can distribute the file in whatever way you want, provided you are not violating any license agreement.