Make options easier to find #10
Description
S-CSS-P are hidden away on a dedicated options page. On Chromium-based browsers, this isn't too bad, as the options page can be accessed by right-clicking the extension in the toolbar and selecting it from the dropdown, though it's not at all intuitive. On Firefox, however, it's much more difficult - the addon doesn't even appear in the toolbar unless it has a browser_action registered, so it's buried away in the browser's settings, and then the options themselves are hidden behind a tiny button. When using addon debugging mode, I couldn't find any UI for opening the options page at all - I had to load the manifest file and then change the URL manually.
A button that lives on the page or on the toolbar would go a long way - this is browser_action:
browser_action is intended for utilities that affect all pages, and there's also page_action which would be much more appropriate for S-CSS-P although it's hidden inside the menu button on the right of the URL bar. I think that would be fine so long as it's documented in the installation.
A menu that pops up on the page would be especially handy with live previewing. The preview images might not even be necessary in that case.