Okular doesn't allow you to open webp images. Please add support. WEBP Support in Web Browsers: https://caniuse.com/webp Info: https://developers.google.com/speed/webp
A possibly relevant merge request was started @ https://invent.kde.org/graphics/okular/-/merge_requests/386
Git commit c38af3e695be5e0cd59732effdc5bb7d63a67951 by Albert Astals Cid. Committed on 24/03/2021 at 22:42. Pushed by aacid into branch 'release/21.04'. Add a few more formats supported by qimageformat plugins Related: bug 434888 M +6 -1 generators/kimgio/libokularGenerator_kimgio.json M +1 -1 generators/kimgio/okularApplication_kimgio.desktop M +1 -1 generators/kimgio/okularKimgio.desktop M +1 -1 generators/kimgio/org.kde.mobile.okular_kimgio.desktop https://invent.kde.org/graphics/okular/commit/c38af3e695be5e0cd59732effdc5bb7d63a67951