ETag filtering

Author: KevinRoebert

CHANGELOG.md

@@ -15,10 +15,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Require Firefox >= 55
 - Require Chrome >= 37
 
-## [1.27.0] - 2022-XX-XX
+## [1.27.0] - 2023-XX-XX
 
 ### Fixed
 - [#276](https://github.com/ClearURLs/Addon/issues/276)
+- [#196](https://github.com/ClearURLs/Addon/issues/196)
+
+# Removed
+- ETag filtering for Firefox. Since Firefox 85, ETags can no longer be used for tracking users over multiple sites.
 
 ### Compatibility note
 - Require Firefox >= 55

core_js/eTagFilter.js

@@ -65,8 +65,14 @@ function generateDummyEtag(len, quotes = true, w = false) {
     return rtn;
 }
 
-browser.webRequest.onHeadersReceived.addListener(
-    eTagFilter,
-    {urls: ["<all_urls>"]},
-    ["blocking", "responseHeaders"]
-);
+/**
+ * Since Firefox 85, eTags can no longer be 
+ * used for tracking users over multiple sites.
+ */
+if(getBrowser() !== "Firefox") {
+    browser.webRequest.onHeadersReceived.addListener(
+        eTagFilter,
+        {urls: ["<all_urls>"]},
+        ["blocking", "responseHeaders"]
+    );
+}

core_js/historyListener.js

@@ -44,7 +44,7 @@ function historyCleaner(details) {
         if(urlBefore !== urlAfter) {
             browser.tabs.executeScript(details.tabId, {
                 frameId: details.frameId,
-                   code: 'history.replaceState({state: "cleaned_history"},"",'+JSON.stringify(urlAfter)+');'
+                   code: 'history.replaceState({state: null},"",'+JSON.stringify(urlAfter)+');'
             }).then(() => {}, onError);
         }
     }

core_js/settings.js

@@ -147,6 +147,20 @@ function getData() {
             changeSwitchButton("domainBlocking", "domainBlocking");
             changeSwitchButton("pingBlocking", "pingBlocking");
             changeSwitchButton("eTagFiltering", "eTagFiltering");
+        })
+        .then(() => {
+            /**
+             * Since Firefox 85, eTags can no longer be 
+             * used for tracking users over multiple sites.
+             */
+            browser.runtime.sendMessage({
+                function: "getBrowser",
+                params: []
+            }).then(resp => {
+                if(resp.response === "Firefox") {
+                    document.getElementById('etag_p').remove();
+                }
+            }, null);
         }).catch(handleError);
 }
 

html/settings.html

@@ -157,7 +157,7 @@
                         <span class="slider round"></span>
                     </label>
                 </p>
-                <p>
+                <p id="etag_p">
                     <label id="eTag_filtering_enabled" style="font-weight: bold;"></label><br />
                     <label class="switch">
                         <input type="checkbox" id="eTagFiltering">

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "ClearURLs",
-  "version": "1.26.1",
+  "version": "1.27.0",
   "author": "Kevin Roebert",
   "description": "__MSG_extension_description__",
   "homepage_url": "https://docs.clearurls.xyz",