tor-browser

commit c1f293bbfaeaa780ee7a8e6a11b9d742a10ad5b8
parent 2b54f26fc923d586e1a59f6f6387ff32015bc653
Author: Emilio Cobos Álvarez <emilio@crisal.io>
Date:   Sat, 13 Dec 2025 09:32:32 +0000

Bug 2005623 - Use a link element for theme experiment stylesheets. r=Gijs

Otherwise the xml-pi has very little priority.

Differential Revision: https://phabricator.services.mozilla.com/D276077

Diffstat:
M
toolkit/modules/LightweightThemeConsumer.sys.mjs
 | 
12
+++++-------

1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/toolkit/modules/LightweightThemeConsumer.sys.mjs b/toolkit/modules/LightweightThemeConsumer.sys.mjs
@@ -471,13 +471,11 @@ LightweightThemeConsumer.prototype = {
     this._lastExperimentData.usedVariables = usedVariables;
 
     if (experiment.stylesheet) {
-      /* Stylesheet URLs are validated using WebExtension schemas */
-      let stylesheetAttr = `href="${experiment.stylesheet}" type="text/css"`;
-      let stylesheet = this._doc.createProcessingInstruction(
-        "xml-stylesheet",
-        stylesheetAttr
-      );
-      this._doc.insertBefore(stylesheet, root);
+      let stylesheet = this._doc.createElement("link");
+      stylesheet.rel = "stylesheet";
+      // Stylesheet URLs are validated using WebExtension schemas
+      stylesheet.href = experiment.stylesheet;
+      this._doc.head.appendChild(stylesheet);
       this._lastExperimentData.stylesheet = stylesheet;
     }
   },