''<p>CesR [[#question-1573142|said]]</p>'' <blockquote>I keep getting this plug for Capital One shopping add-on. I keep rejecting it, but keeps coming back. I do have Capital One card - but not sure how connected those two are. </blockquote> Looks like the same company to me and that's why you're getting the ad. https://addons.mozilla.org/en-US/firefox/addon/wikibuy-for-firefox/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search You will need to do your own research and make a decision. This is similar to that honey add-on. Just look an item that you're interested in on one device and then add the add-on on another device and see if you get better pricing. If no other questions, mark this question as resolved and have a nice day.