diff --git a/java/src/org/openqa/selenium/devtools/CdpEndpointFinder.java b/java/src/org/openqa/selenium/devtools/CdpEndpointFinder.java
index aab44f536d598..91c25138c23df 100644
--- a/java/src/org/openqa/selenium/devtools/CdpEndpointFinder.java
+++ b/java/src/org/openqa/selenium/devtools/CdpEndpointFinder.java
@@ -91,6 +91,9 @@ public static Optional<URI> getReportedUri(Capabilities caps) {
         break;
       case "firefox":
         key = "moz:debuggerAddress";
+        LOG.warning(
+            "CDP support for Firefox is deprecated and will be removed in future versions. "
+                + "Please switch to WebDriver BiDi.");
         break;
       default:
         return Optional.empty();
diff --git a/java/src/org/openqa/selenium/firefox/FirefoxDriver.java b/java/src/org/openqa/selenium/firefox/FirefoxDriver.java
index 1745564ffdaf8..a6beac5461e85 100644
--- a/java/src/org/openqa/selenium/firefox/FirefoxDriver.java
+++ b/java/src/org/openqa/selenium/firefox/FirefoxDriver.java
@@ -164,6 +164,13 @@ private FirefoxDriver(
 
     Optional<URI> reportedUri =
         CdpEndpointFinder.getReportedUri("moz:debuggerAddress", capabilities);
+
+    if (reportedUri.isPresent()) {
+      LOG.warning(
+          "CDP support for Firefox is deprecated and will be removed in future versions. "
+              + "Please switch to WebDriver BiDi.");
+    }
+
     Optional<HttpClient> client =
         reportedUri.map(uri -> CdpEndpointFinder.getHttpClient(factory, uri));
     Optional<URI> cdpUri;
diff --git a/javascript/node/selenium-webdriver/lib/webdriver.js b/javascript/node/selenium-webdriver/lib/webdriver.js
index e004e4505c1e4..2c6a9aa48e259 100644
--- a/javascript/node/selenium-webdriver/lib/webdriver.js
+++ b/javascript/node/selenium-webdriver/lib/webdriver.js
@@ -1230,6 +1230,12 @@ class WebDriver {
 
     const caps = await this.getCapabilities()
 
+    if (caps['map_'].get('browserName') === 'firefox') {
+      console.warn(
+        'CDP support for Firefox is deprecated and will be removed in future versions. Please switch to WebDriver BiDi.',
+      )
+    }
+
     if (process.env.SELENIUM_REMOTE_URL) {
       const host = new URL(process.env.SELENIUM_REMOTE_URL).host
       const sessionId = await this.getSession().then((session) => session.getId())