diff --git a/docs/configuration.rst b/docs/configuration.rst
index f52f5ce1..87a8af28 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -817,15 +817,24 @@ Default
 Example
     * ``"curl/8.14.1"``
     * ``"browser"``
-    * ``"@chrome"``
+    * ``"+chrome"``
+    * ``"@/opt/ChromeBrowser/bin/chrome"``
 Description
     User-Agent header value used for HTTP requests.
 
     Setting this value to ``"browser"`` will try to automatically detect
     and use the ``User-Agent`` header of the system's default browser.
 
-    Setting this value to ``"@BROWSER"``, e.g. ``"@chrome"``, will try to automatically detect
-    and use the ``User-Agent`` header of this installed browser.
+    | Starting this value with a ``+``
+      will use the latest ``User-Agent`` header of this preset target,
+      e.g. ``"+ff"``.
+    | (Supported values:
+      ``firefox`` | ``ff`` | ``chrome`` | ``cr`` | ``gallery-dl`` | ``gdl``)
+
+    | Starting this value with an ``@``
+     will try to automatically detect and use the ``User-Agent`` header
+     of this installed browser,
+    | e.g. ``"@C:/Program Files/Zen Browser/zen-browser.exe"``.
 
 
 extractor.*.browser
diff --git a/gallery_dl/extractor/common.py b/gallery_dl/extractor/common.py
index a6379a3e..69c68568 100644
--- a/gallery_dl/extractor/common.py
+++ b/gallery_dl/extractor/common.py
@@ -475,6 +475,17 @@ class Extractor():
             headers["User-Agent"] = _browser_useragent(None)
         elif custom_ua[0] == "@":
             headers["User-Agent"] = _browser_useragent(custom_ua[1:])
+        elif custom_ua[0] == "+":
+            custom_ua = custom_ua[1:].lower()
+            if custom_ua in {"firefox", "ff"}:
+                headers["User-Agent"] = util.USERAGENT_FIREFOX
+            elif custom_ua in {"chrome", "cr"}:
+                headers["User-Agent"] = util.USERAGENT_CHROME
+            elif custom_ua in {"gallery-dl", "gallerydl", "gdl"}:
+                headers["User-Agent"] = util.USERAGENT_GALLERYDL
+            else:
+                self.log.warning(
+                    "Unsupported User-Agent preset '%s'", custom_ua)
         elif self.useragent is Extractor.useragent and not self.browser or \
                 custom_ua is not config.get(("extractor",), "user-agent"):
             headers["User-Agent"] = custom_ua