Hi, thanks!

If you want the highlighting to *only be manually activated*:

1. Go to the popup (toolbar > click Mark My Search icon (may be in the Extensions list))
2. Uncheck "Detect search engines".

If you want the highlighting to be *extracted from the search but hidden*:

1. Go to settings (toolbar > click Mark My Search icon (may be in the Extensions list) > click Options)
2. Uncheck these settings:
- ["Visibility when highlighting search engine keywords"]: "Highlights begin visible"
- ["When to collapse the toolbar immediately"]: "Started from a search"
3. Save your changes by scrolling to the bottom and clicking "Save".