eBay border
The extension adds a red border inside your browser on all eBay domain names that don't match with the preset eBay domain name.
For example: If your main eBay website is www.ebay.com, but for some reason eBay is redirecting you to other eBay domain names (for example: www.ebay.ca) then a red border will appear in your browser thus notifying of this action.
Simply click on the extension icon in your browser and set your main eBay domain name and hit save. By default the eBay domain name is set to .com.