Maybe this helps you 
Sort of add-on to exclude the games/dlcs you don't want:
chrome.google.com
addons.mozilla.org
Sort of add-on to exclude the games/dlcs you don't want:
IndieGala Helper - Chrome Web Store
Bundles - Shows games which are already in your library. - Shows approximate value of trading cards received. Giveaways - Dark…
chrome.google.com
IndieGala Helper – Adoptez cette extension pour 🦊 Firefox (fr)
Télécharger IndieGala Helper pour Firefox. Bundles: Shows which games are already in your library. Giveaways: Shows which games are already in your library. Replaced "Read More" with link to games steam