diff --git a/src/fime/util.py b/src/fime/util.py
index b579bd6..44f1980 100644
--- a/src/fime/util.py
+++ b/src/fime/util.py
@@ -1,9 +1,10 @@
 import enum
 
+import browser_cookie3
 from loguru import logger
 from requests import Session
 
-from fime.config import Config, AuthMethods
+from fime.config import Config, AuthMethods, Browsers
 
 try:
     from PySide6 import QtCore, QtGui, QtWidgets
@@ -61,6 +62,21 @@ def add_auth(config: Config, session: Session):
         case AuthMethods.TOKEN:
             session.headers["Authorization"] = f"Bearer {config.jira_token}"
         case AuthMethods.COOKIES:
-            raise NotImplemented
+            match config.cookie_source:
+                case Browsers.AUTO:
+                    cookie_jar = browser_cookie3.load()
+                case Browsers.FIREFOX:
+                    cookie_jar = browser_cookie3.firefox()
+                case Browsers.CHROME:
+                    cookie_jar = browser_cookie3.chrome()
+                case Browsers.CHROMIUM:
+                    cookie_jar = browser_cookie3.chromium()
+                case Browsers.EDGE:
+                    cookie_jar = browser_cookie3.edge()
+                case Browsers.OPERA:
+                    cookie_jar = browser_cookie3.opera()
+                case _:
+                    raise AssertionError("Unknown cookie_source")
+            session.cookies = cookie_jar
         case _:
             raise AssertionError("Unknown auth method")