chore: Enable EME widevine support and update theme data

configs/common/mozconfig

@@ -86,7 +86,7 @@ ac_add_options --enable-raw
 ac_add_options --enable-webrtc
 ac_add_options --enable-jxl
 ac_add_options --enable-av1
-ac_add_options --disable-eme
+ac_add_options --enable-eme=widevine
 
 ac_add_options --allow-addon-sideload
 ac_add_options --with-unsigned-addon-scopes=app,system

src/browser/app/profile/zen-browser.js

@@ -75,7 +75,6 @@ pref('zen.keyboard.shortcuts.enabled', true);
 pref('zen.keyboard.shortcuts', ""); // Empty string means default shortcuts
 pref('zen.keyboard.shortcuts.disable-firefox', false);
 pref('zen.tabs.dim-pending', true);
-pref('zen.themes.data', "{}");
 
 // Pref to enable the new profiles (TODO: Check this out!)
 //pref("browser.profiles.enabled", true);