Using 0.10.3 on Firefox and Waterfox. Same issue happens: Settings do not appear to save.

Cannot remove a custom search engine because, while it's been saved to its file(s), the item does not appear in the list.

Timing appears to set itself back to the 10/min when I'm actually set to 1/min

Otherwise, this is a great tool for poisoning the data well. Security through obscurity. Thank you for this.