Great Extension. It increased my work flow by a million. I found no issue making the history size and list 20,000. I'd suggest you change the default keybinding to toggle it.

Only one time I had issues with it and needed to recreate my profile to fix it. Clearing history and cache wouldn't stop the errors. They weren't related to the options either since I removed them in troubleshooting.

This extension needs more publicity. It's great.

Thank you Simon!