diff --git a/extension/js/common/browser/browser-msg.ts b/extension/js/common/browser/browser-msg.ts
index cdf867c2e96..1c87942e5b8 100644
--- a/extension/js/common/browser/browser-msg.ts
+++ b/extension/js/common/browser/browser-msg.ts
@@ -118,7 +118,6 @@ export namespace Bm {
     export type ExpirationCacheDeleteExpired = Promise<void>;
     export type ThunderbirdGetDownloadableAttachment = ThunderbirdAttachment[];
     export type ThunderbirdGetCurrentUser = string | undefined;
-    export type ThunderbirdMsgGet = { attachments: messenger.messages.MessageAttachment[]; messagePart: messenger.messages.MessagePart };
     export type ThunderbirdOpenPassphraseDialog = Promise<void>;
     export type ThunderbirdInitiateAttachmentDownload = Promise<void>;
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -138,8 +137,7 @@ export namespace Bm {
       | ExpirationCacheDeleteExpired
       | AjaxGmailAttachmentGetChunk
       | ConfirmationResult
-      | ThunderbirdGetDownloadableAttachment
-      | ThunderbirdMsgGet;
+      | ThunderbirdGetDownloadableAttachment;
   }
 
   export type AnyRequest =
@@ -251,7 +249,6 @@ export class BrowserMsg {
           BrowserMsg.sendAwait(undefined, 'thunderbirdInitiateAttachmentDownload', bm, true) as Promise<Bm.Res.ThunderbirdInitiateAttachmentDownload>,
         thunderbirdGetCurrentUser: () =>
           BrowserMsg.sendAwait(undefined, 'thunderbirdGetCurrentUser', undefined, true) as Promise<Bm.Res.ThunderbirdGetCurrentUser>,
-        thunderbirdMsgGet: () => BrowserMsg.sendAwait(undefined, 'thunderbirdMsgGet', undefined, true) as Promise<Bm.Res.ThunderbirdMsgGet>,
         thunderbirdOpenPassphraseDiaglog: (bm: Bm.ThunderbirdOpenPassphraseDialog) =>
           BrowserMsg.sendAwait(undefined, 'thunderbirdOpenPassphraseDialog', bm, true) as Promise<Bm.Res.ThunderbirdOpenPassphraseDialog>,
       },
diff --git a/extension/js/service_worker/background.ts b/extension/js/service_worker/background.ts
index 34a09c3499b..a8496d5763b 100644
--- a/extension/js/service_worker/background.ts
+++ b/extension/js/service_worker/background.ts
@@ -74,7 +74,6 @@ console.info('background.js service worker starting');
     BgHandlers.thunderbirdSecureComposeHandler();
     await BgHandlers.thunderbirdContentScriptRegistration();
     BrowserMsg.bgAddListener('thunderbirdGetCurrentUser', BgHandlers.thunderbirdGetCurrentUserHandler);
-    BrowserMsg.bgAddListener('thunderbirdMsgGet', BgHandlers.thunderbirdMsgGetHandler);
     BrowserMsg.bgAddListener('thunderbirdGetDownloadableAttachment', BgHandlers.thunderbirdGetDownloadableAttachment);
     BrowserMsg.bgAddListener('thunderbirdInitiateAttachmentDownload', BgHandlers.thunderbirdInitiateAttachmentDownload);
     BrowserMsg.bgAddListener('thunderbirdOpenPassphraseDialog', BgHandlers.thunderbirdOpenPassphraseDialog);
diff --git a/extension/js/service_worker/bg-handlers.ts b/extension/js/service_worker/bg-handlers.ts
index ac0d65ad563..a185d06b703 100644
--- a/extension/js/service_worker/bg-handlers.ts
+++ b/extension/js/service_worker/bg-handlers.ts
@@ -218,19 +218,6 @@ export class BgHandlers {
     return;
   };
 
-  public static thunderbirdMsgGetHandler = async (): Promise<Bm.Res.ThunderbirdMsgGet> => {
-    const [tab] = await messenger.tabs.query({ active: true, currentWindow: true });
-    if (tab.id) {
-      const message = await messenger.messageDisplay.getDisplayedMessage(tab.id);
-      if (message?.id) {
-        const attachments = await messenger.messages.listAttachments(message.id);
-        const messagePart = await messenger.messages.getFull(message.id);
-        return { attachments, messagePart };
-      }
-    }
-    return { attachments: [], messagePart: {} as messenger.messages.MessagePart };
-  };
-
   public static thunderbirdOpenPassphraseDialog = async (r: Bm.ThunderbirdOpenPassphraseDialog): Promise<Bm.Res.ThunderbirdOpenPassphraseDialog> => {
     await BgUtils.openExtensionTab(`chrome/elements/passphrase.htm?type=message&parentTabId=0&acctEmail=${r.acctEmail}&longids=${r.longids}`, true);
   };