I have a Capital One card and wanted to use that feature. As far as I could tell, the only way to use it was to install their "assistant" browser extension and give it permission to view everything you do. Then if you were on a merchant site it could suggest you use a new card number for it. I considered toggling the assistant on and off just as needed but instead said nope. Was there another way to do it?
You can give selective access[0] to the extensions in Chrome. The restrictive access is that it will get access to the webpage only when you click the extension. Read under "Let extensions read and change site data"
Totally bogus, isn’t it? I just did that very thing with CapOne. The only saving grace is that once you create the temp card with their definitely-not-spyware web browser extension, you can uninstall it completely and manage the card through the website. I’ve installed it, visited a single site, and uninstalled it several times so far and it seems to get the job done.