diff --git a/config/hypr/UserConfigs/WindowRules.conf b/config/hypr/UserConfigs/WindowRules.conf
index 7e1a43a..602531e 100644
--- a/config/hypr/UserConfigs/WindowRules.conf
+++ b/config/hypr/UserConfigs/WindowRules.conf
@@ -68,6 +68,7 @@ windowrulev2 = float, class:^([Ff]erdium)$
 windowrulev2 = opacity 0.9 0.6, class:^([Rr]ofi)$
 windowrulev2 = opacity 0.9 0.7, class:^(Brave-browser(-beta|-dev)?)$
 windowrulev2 = opacity 0.9 0.7, class:^([Ff]irefox|org.mozilla.firefox|[Ff]irefox-esr)$
+windowrulev2 = opacity 0.9 0.6, class:^([Tt]horium-browser)$
 windowrulev2 = opacity 0.9 0.8, class:^([Mm]icrosoft-edge(-stable|-beta|-dev|-unstable)?)$
 windowrulev2 = opacity 0.9 0.8, class:^(google-chrome(-beta|-dev|-unstable)?)$
 windowrulev2 = opacity 0.94 0.86, class:^(chrome-.+-Default)$ # Chrome PWAs