diff --git a/extension/app/src/components/conversation/AttachFragment.tsx b/extension/app/src/components/conversation/AttachFragment.tsx
index 7266283bb841..a58b9dd740ef 100644
--- a/extension/app/src/components/conversation/AttachFragment.tsx
+++ b/extension/app/src/components/conversation/AttachFragment.tsx
@@ -1,20 +1,24 @@
+import type { LightWorkspaceType } from "@dust-tt/client";
 import { Button, CameraIcon, DocumentPlusIcon } from "@dust-tt/sparkle";
 import { InputBarContext } from "@extension/components/input_bar/InputBarContext";
+import { useCurrentDomain } from "@extension/hooks/useCurrentDomain";
 import type { FileUploaderService } from "@extension/hooks/useFileUploaderService";
 import { useContext, useEffect } from "react";
 
 type AttachFragmentProps = {
+  owner: LightWorkspaceType;
   fileUploaderService: FileUploaderService;
   isLoading: boolean;
 };
 
 export const AttachFragment = ({
+  owner,
   fileUploaderService,
   isLoading,
 }: AttachFragmentProps) => {
+  // Blinking animation.
   const { attachPageBlinking, setAttachPageBlinking } =
     useContext(InputBarContext);
-
   useEffect(() => {
     let timer: NodeJS.Timeout;
     if (attachPageBlinking) {
@@ -25,12 +29,23 @@ export const AttachFragment = ({
     return () => clearTimeout(timer);
   }, [attachPageBlinking]);
 
+  // Blacklisting logic to disable share buttons.
+  const currentDomain = useCurrentDomain();
+  const blacklistedDomains: string[] = owner.blacklistedDomains ?? [];
+  const isBlacklisted = blacklistedDomains.some((d) =>
+    currentDomain.endsWith(d)
+  );
+
   return (
     <>
       <div className="block sm:hidden">
         <Button
           icon={DocumentPlusIcon}
-          tooltip="Attach text from page"
+          tooltip={
+            !isBlacklisted
+              ? "Attach text from page"
+              : "Attachment disabled on this website"
+          }
           variant="outline"
           size="sm"
           className={attachPageBlinking ? "animate-[bgblink_200ms_3]" : ""}
@@ -40,13 +55,17 @@ export const AttachFragment = ({
               includeCapture: false,
             })
           }
-          disabled={isLoading}
+          disabled={isLoading || isBlacklisted}
         />
       </div>
       <div className="block sm:hidden">
         <Button
           icon={CameraIcon}
-          tooltip="Attach page screenshot"
+          tooltip={
+            !isBlacklisted
+              ? "Attach page screenshot"
+              : "Attachment disabled on this website"
+          }
           variant="outline"
           size="sm"
           onClick={() =>
@@ -55,14 +74,18 @@ export const AttachFragment = ({
               includeCapture: true,
             })
           }
-          disabled={isLoading}
+          disabled={isLoading || isBlacklisted}
         />
       </div>
       <div className="hidden sm:block">
         <Button
           icon={DocumentPlusIcon}
           label="Add page text"
-          tooltip="Attach text from page"
+          tooltip={
+            !isBlacklisted
+              ? "Attach text from page"
+              : "Attachment disabled on this website"
+          }
           variant="outline"
           size="sm"
           className={attachPageBlinking ? "animate-[bgblink_200ms_3]" : ""}
@@ -72,14 +95,18 @@ export const AttachFragment = ({
               includeCapture: false,
             })
           }
-          disabled={isLoading}
+          disabled={isLoading || isBlacklisted}
         />
       </div>
       <div className="hidden sm:block">
         <Button
           icon={CameraIcon}
           label="Add page screenshot"
-          tooltip="Attach page screenshot"
+          tooltip={
+            !isBlacklisted
+              ? "Attach page screenshot"
+              : "Attachment disabled on this website"
+          }
           variant="outline"
           size="sm"
           onClick={() =>
@@ -88,7 +115,7 @@ export const AttachFragment = ({
               includeCapture: true,
             })
           }
-          disabled={isLoading}
+          disabled={isLoading || isBlacklisted}
         />
       </div>
     </>
diff --git a/extension/app/src/components/input_bar/InputBarContainer.tsx b/extension/app/src/components/input_bar/InputBarContainer.tsx
index 5fd162269f03..34a4327fa4f8 100644
--- a/extension/app/src/components/input_bar/InputBarContainer.tsx
+++ b/extension/app/src/components/input_bar/InputBarContainer.tsx
@@ -134,6 +134,7 @@ export const InputBarContainer = ({
 
       <div className="flex items-center justify-end space-x-2 mt-2">
         <AttachFragment
+          owner={owner}
           fileUploaderService={fileUploaderService}
           isLoading={isSubmitting}
         />
diff --git a/extension/app/src/hooks/useCurrentDomain.ts b/extension/app/src/hooks/useCurrentDomain.ts
new file mode 100644
index 000000000000..6657c906619e
--- /dev/null
+++ b/extension/app/src/hooks/useCurrentDomain.ts
@@ -0,0 +1,63 @@
+import { useEffect, useState } from "react";
+
+export const useCurrentDomain = () => {
+  const [currentDomain, setCurrentDomain] = useState<string>("");
+
+  useEffect(() => {
+    // Function to update domain from tab.
+    const updateDomainFromTab = (tab: chrome.tabs.Tab) => {
+      if (tab?.url) {
+        try {
+          const url = new URL(tab.url);
+          if (url.protocol.startsWith("http")) {
+            setCurrentDomain(url.hostname);
+          }
+        } catch (e) {
+          console.error("Invalid URL:", e);
+          setCurrentDomain("");
+        }
+      }
+    };
+
+    // Update domain when active tab changes.
+    const handleTabActivated = (activeInfo: chrome.tabs.TabActiveInfo) => {
+      chrome.tabs.get(activeInfo.tabId, (tab) => {
+        updateDomainFromTab(tab);
+      });
+    };
+
+    // Update domain when tab URL changes.
+    const handleTabUpdated = (
+      tabId: number,
+      changeInfo: chrome.tabs.TabChangeInfo,
+      tab: chrome.tabs.Tab
+    ) => {
+      if (changeInfo.status === "complete") {
+        chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
+          if (tabs[0]?.id === tabId) {
+            updateDomainFromTab(tab);
+          }
+        });
+      }
+    };
+
+    // Get initial domain.
+    chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
+      if (tabs[0]) {
+        updateDomainFromTab(tabs[0]);
+      }
+    });
+
+    // Add listeners.
+    chrome.tabs.onActivated.addListener(handleTabActivated);
+    chrome.tabs.onUpdated.addListener(handleTabUpdated);
+
+    // Cleanup listeners.
+    return () => {
+      chrome.tabs.onActivated.removeListener(handleTabActivated);
+      chrome.tabs.onUpdated.removeListener(handleTabUpdated);
+    };
+  }, []);
+
+  return currentDomain;
+};