diff --git a/src/config.ts b/src/config.ts
index 6a00e08f..7838104a 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -254,6 +254,10 @@ const DEFAULTS = o({
         "curl -fsSl https://raw.githubusercontent.com/cmcaine/tridactyl/master/native/install.sh | bash",
     profiledir: "auto",
 
+    // Container settings
+    // If enabled, tabopen opens a new tab in the currently active tab's container.
+    tabopencontaineraware: "false",
+
     // Performance related settings
 
     // number of most recent results to ask Firefox for. We display the top 20 or so most frequently visited ones.
diff --git a/src/excmds.ts b/src/excmds.ts
index 17f3c0bb..8f5463d6 100644
--- a/src/excmds.ts
+++ b/src/excmds.ts
@@ -87,7 +87,7 @@
 
 // Shared
 import * as Messaging from "./messaging"
-import { l, browserBg, activeTabId } from "./lib/webext"
+import { l, browserBg, activeTabId, activeTabContainerId } from "./lib/webext"
 import state from "./state"
 import * as UrlUtil from "./url_util"
 import * as config from "./config"
@@ -1244,7 +1244,10 @@ export async function tabopen(...addressarr: string[]) {
     } else if (address != "") url = forceURI(address)
     else url = forceURI(config.get("newtab"))
 
-    openInNewTab(url, { active })
+    activeTabContainerId().then(containerId => {
+        if (containerId && config.get("tabopencontaineraware") === "true") openInNewTab(url, { active: active, cookieStoreId: containerId })
+        else openInNewTab(url, { active })
+    })
 }
 
 /** Resolve a tab index to the tab id of the corresponding tab in this window.
diff --git a/src/hinting.ts b/src/hinting.ts
index 7a8b53f6..1f62a192 100644
--- a/src/hinting.ts
+++ b/src/hinting.ts
@@ -537,7 +537,7 @@ const HINTTAGS_saveable = `
 [href]:not([href='#'])
 `
 
-import { openInNewTab } from "./lib/webext"
+import { openInNewTab, activeTabContainerId } from "./lib/webext"
 
 /** if `target === _blank` clicking the link is treated as opening a popup and is blocked. Use webext API to avoid that. */
 function simulateClick(target: HTMLElement) {
@@ -550,7 +550,18 @@ function simulateClick(target: HTMLElement) {
         (target as HTMLAnchorElement).target === "_blank" ||
         (target as HTMLAnchorElement).target === "_new"
     ) {
-        openInNewTab((target as HTMLAnchorElement).href, { related: true })
+        // Try to open the new tab in the same container as the current one.
+        activeTabContainerId().then(containerId => {
+            if (containerId)
+                openInNewTab((target as HTMLAnchorElement).href, {
+                    related: true,
+                    cookieStoreId: containerId,
+                })
+            else
+                openInNewTab((target as HTMLAnchorElement).href, {
+                    related: true,
+                })
+        })
     } else {
         DOM.mouseEvent(target, "click")
         // DOM.focus has additional logic for focusing inputs
@@ -563,10 +574,21 @@ function hintPageOpenInBackground(selectors = HINTTAGS_selectors) {
         hint.target.focus()
         if (hint.target.href) {
             // Try to open with the webext API. If that fails, simulate a click on this page anyway.
-            openInNewTab(hint.target.href, {
-                active: false,
-                related: true,
-            }).catch(() => simulateClick(hint.target))
+            // Try to open the new tab in the same container as the current one.
+            activeTabContainerId().then(containerId => {
+                if (containerId) {
+                    openInNewTab(hint.target.href, {
+                        active: false,
+                        related: true,
+                        cookieStoreId: containerId,
+                    }).catch(() => simulateClick(hint.target))
+                } else {
+                    openInNewTab(hint.target.href, {
+                        active: false,
+                        related: true,
+                    }).catch(() => simulateClick(hint.target))
+                }
+            })
         } else {
             // This is to mirror vimperator behaviour.
             simulateClick(hint.target)
diff --git a/src/lib/webext.ts b/src/lib/webext.ts
index 25d414bf..c28ce2ad 100644
--- a/src/lib/webext.ts
+++ b/src/lib/webext.ts
@@ -67,6 +67,11 @@ export async function activeTabId() {
     return (await activeTab()).id
 }
 
+//#background_helper
+export async function activeTabContainerId() {
+    return (await activeTab()).cookieStoreId
+}
+
 /** Compare major firefox versions */
 export async function firefoxVersionAtLeast(desiredmajor: number) {
     const versionstr = (await browserBg.runtime.getBrowserInfo()).version
@@ -88,12 +93,17 @@ export async function firefoxVersionAtLeast(desiredmajor: number) {
 */
 export async function openInNewTab(
     url: string,
-    kwargs: { active?; related? } = { active: true, related: false },
+    kwargs: { active?; related?; cookieStoreId? } = {
+        active: true,
+        related: false,
+        cookieStoreId: undefined,
+    },
 ) {
     const thisTab = await activeTab()
     const options: any = {
         active: kwargs.active,
         url,
+        cookieStoreId: kwargs.cookieStoreId,
     }
 
     // Be nice to behrmann, #342
diff --git a/src/manifest.json b/src/manifest.json
index d45cd0ec..f5181a54 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -43,6 +43,8 @@
         "bookmarks",
         "browsingData",
         "contextMenus",
+        "contextualIdentities",
+        "cookies",
         "clipboardWrite",
         "clipboardRead",
         "downloads",
@@ -63,4 +65,4 @@
             "strict_min_version": "54.0"
         }
     }
-}
\ No newline at end of file
+}