A simple Stop button
A simple Stop button, for those who want one to the right of the Address Bar.
To save RAM, the extension uses an event page rather than a persistent background page. Hopefully it won't lag during heavy disk access.
For a Reload button, see:
0.5: Updated icons to match Chrome's new Material theme.
0.4: Replaced scary <all_urls> permission with "activeTab". Consequently, minimum Chrome version bumped to 26.
0.3: Removed "tabs" permission. Turns out it isn't needed to call chrome.tabs.executeScript.