This add-on injects CSS into web pages. The addons.mozilla.org
domain disallows this operation, so this add-on will not work properly when it's run on pages in the addons.mozilla.org
domain.
This extension includes:
- a background script, "background.js"
- a page action
It adds the page action to every tab the user opens. Clicking the page action for a tab applies some CSS using tabs.insertCSS.
Clicking again removes the CSS using tabs.removeCSS.
- some basic page action functions
- how to apply and remove CSS.