I find the popup banners on websites asking me to accept cookies quite annoying so I wrote a browser extension to hide them for me.
The extension automatically identifies potential banner elements in the page, highlights the banner and asks the user if they'd like to hide it.
If the user clicks 'yes' the the banner will be hidden. If the user clicks 'no' then the banner will be outlined in green but otherwise left alone.
I recently updated this extension to allow it to remember user decisions for particular sites and automatically apply them when the pages load.
You can download it here if you'd like to try it out.