Extremely slow browsing.

[aeschylus]

The plugin can often bring browsing to a halt. This probably has something to do with when the content script is being injected/when the events to collect data are being handled. If an event handler is being fired in the middle of a page load, the handler will block the load, and user actions, until it is finished.

Investigate encapsulating some of the event handling in worker threads. The problem is exacerbated when the database is turned on.

[mekarpeles]

Also, on restart, the content script gets run to every page (including screen captures)