Hi rotie, could you start a thread on https://github.com/jscher2000/Save-webP-as-extension/issues/ and give an example of a page where it doesn't work, or email me at jscher2000@outlook.com

**Update** I noticed this can happen in a framed page. Try using either right-click > Open Image in New Tab (use the stand-alone image viewer), or right-click > This Frame > Open Frame in New Tab to work around this issue for now. Hopefully I can figure out the issue.