diff --git a/etc/firefox/policies/policies.json b/etc/firefox/policies/policies.json
index 04b0c753..b5ba6e9f 100644
--- a/etc/firefox/policies/policies.json
+++ b/etc/firefox/policies/policies.json
@@ -274,6 +274,13 @@
 				"private_browsing": true,
 				"restricted_domains": []
 			},
+			"Tab-Session-Manager@sienori": {
+				"blocked_install_message": "Tab Session Manager",
+				"default_area": "navbar",
+				"install_url": "https://addons.mozilla.org/firefox/downloads/latest/tab-session-manager/latest.xpi",
+				"installation_mode": "normal_installed",
+				"private_browsing": true
+			},
 			"addon@darkreader.org": {
 				"blocked_install_message": "DarkReader",
 				"default_area": "navbar",
diff --git a/etc/opt/chromium/policies/managed/aminda-extensions.json b/etc/opt/chromium/policies/managed/aminda-extensions.json
index d4c2719c..586f799f 100644
--- a/etc/opt/chromium/policies/managed/aminda-extensions.json
+++ b/etc/opt/chromium/policies/managed/aminda-extensions.json
@@ -407,6 +407,13 @@
 			"toolbar_pin": "default_unpinned",
 			"update_url": "https://clients2.google.com/service/update2/crx"
 		},
+		"iaiomicjabeggjcfkbimgmglanimpnae": {
+			"blocked_install_message": "Tab Session Manager",
+			"installation_mode": "normal_installed",
+			"override_update_url": true,
+			"toolbar_pin": "force_pinned",
+			"update_url": "https://clients2.google.com/service/update2/crx"
+		},
 		"iimpkhokkfekbpmoamlmcndclohnehhk": {
 			"blocked_install_message": "IPvFooBar. ManifestV2 unlike the original.",
 			"installation_mode": "blocked",