diff --git a/src/background/notification.background.ts b/src/background/notification.background.ts
index b92b58e245..d11e8e72e2 100644
--- a/src/background/notification.background.ts
+++ b/src/background/notification.background.ts
@@ -91,7 +91,7 @@ export default class NotificationBackground {
         }
     }
 
-    async checkNotificationQueue(tab: any = null): Promise<any> {
+    async checkNotificationQueue(tab: chrome.tabs.Tab = null): Promise<void> {
         if (this.notificationQueue.length === 0) {
             return;
         }
@@ -116,7 +116,7 @@ export default class NotificationBackground {
         setTimeout(() => this.cleanupNotificationQueue(), 2 * 60 * 1000); // check every 2 minutes
     }
 
-    private doNotificationQueueCheck(tab: any) {
+    private doNotificationQueueCheck(tab: chrome.tabs.Tab): void {
         if (tab == null) {
             return;
         }
@@ -150,7 +150,7 @@ export default class NotificationBackground {
         }
     }
 
-    private removeTabFromNotificationQueue(tab: any) {
+    private removeTabFromNotificationQueue(tab: chrome.tabs.Tab) {
         for (let i = this.notificationQueue.length - 1; i >= 0; i--) {
             if (this.notificationQueue[i].tabId === tab.id) {
                 this.notificationQueue.splice(i, 1);
@@ -158,7 +158,7 @@ export default class NotificationBackground {
         }
     }
 
-    private async addLogin(loginInfo: any, tab: any) {
+    private async addLogin(loginInfo: any, tab: chrome.tabs.Tab) {
         const loginDomain = Utils.getDomain(loginInfo.url);
         if (loginDomain == null) {
             return;
@@ -200,7 +200,7 @@ export default class NotificationBackground {
         }
     }
 
-    private async pushAddLoginToQueue(loginDomain: string, loginInfo: any, tab: any, isVaultLocked: boolean = false) {
+    private async pushAddLoginToQueue(loginDomain: string, loginInfo: any, tab: chrome.tabs.Tab, isVaultLocked: boolean = false) {
         // remove any old messages for this tab
         this.removeTabFromNotificationQueue(tab);
         const message: AddLoginQueueMessage = {
@@ -217,7 +217,7 @@ export default class NotificationBackground {
         await this.checkNotificationQueue(tab);
     }
 
-    private async changedPassword(changeData: any, tab: any) {
+    private async changedPassword(changeData: any, tab: chrome.tabs.Tab) {
         const loginDomain = Utils.getDomain(changeData.url);
         if (loginDomain == null) {
             return;
@@ -243,7 +243,7 @@ export default class NotificationBackground {
         }
     }
 
-    private async pushChangePasswordToQueue(cipherId: string, loginDomain: string, newPassword: string, tab: any, isVaultLocked: boolean = false) {
+    private async pushChangePasswordToQueue(cipherId: string, loginDomain: string, newPassword: string, tab: chrome.tabs.Tab, isVaultLocked: boolean = false) {
         // remove any old messages for this tab
         this.removeTabFromNotificationQueue(tab);
         const message: AddChangePasswordQueueMessage = {
@@ -259,7 +259,7 @@ export default class NotificationBackground {
         await this.checkNotificationQueue(tab);
     }
 
-    private async saveOrUpdateCredentials(tab: any, folderId?: string) {
+    private async saveOrUpdateCredentials(tab: chrome.tabs.Tab, folderId?: string) {
         for (let i = this.notificationQueue.length - 1; i >= 0; i--) {
             const queueMessage = this.notificationQueue[i];
             if (queueMessage.tabId !== tab.id ||
@@ -346,7 +346,7 @@ export default class NotificationBackground {
         }
     }
 
-    private async saveNever(tab: any) {
+    private async saveNever(tab: chrome.tabs.Tab) {
         for (let i = this.notificationQueue.length - 1; i >= 0; i--) {
             const queueMessage = this.notificationQueue[i];
             if (queueMessage.tabId !== tab.id || queueMessage.type !== 'addLogin') {
@@ -366,7 +366,7 @@ export default class NotificationBackground {
         }
     }
 
-    private async getDataForTab(tab: any, responseCommand: string) {
+    private async getDataForTab(tab: chrome.tabs.Tab, responseCommand: string) {
         const responseData: any = {};
         if (responseCommand === 'notificationBarGetFoldersList') {
             responseData.folders = await this.folderService.getAllDecrypted();
diff --git a/src/browser/browserApi.ts b/src/browser/browserApi.ts
index 648394c9bd..7ccc549e37 100644
--- a/src/browser/browserApi.ts
+++ b/src/browser/browserApi.ts
@@ -48,7 +48,7 @@ export class BrowserApi {
         return null;
     }
 
-    static tabSendMessageData(tab: any, command: string, data: any = null): Promise<any[]> {
+    static tabSendMessageData(tab: chrome.tabs.Tab, command: string, data: any = null): Promise<any[]> {
         const obj: any = {
             command: command,
         };
@@ -60,7 +60,7 @@ export class BrowserApi {
         return BrowserApi.tabSendMessage(tab, obj);
     }
 
-    static async tabSendMessage(tab: any, obj: any, options: any = null): Promise<any> {
+    static async tabSendMessage(tab: chrome.tabs.Tab, obj: any, options: chrome.tabs.MessageSendOptions = null): Promise<any> {
         if (!tab || !tab.id) {
             return;
         }