diff --git a/src/calibre/utils/run_tests.py b/src/calibre/utils/run_tests.py
index 38fb3bb092..57c8955820 100644
--- a/src/calibre/utils/run_tests.py
+++ b/src/calibre/utils/run_tests.py
@@ -178,7 +178,7 @@ class TestImports(unittest.TestCase):
     def test_import_of_all_python_modules(self):
         from calibre.constants import isbsd, islinux, ismacos, iswindows
         exclude_packages = {'calibre.devices.mtp.unix.upstream'}
-        exclude_modules = set()
+        exclude_modules = {'calibre.web.automate.browser'}
         if not iswindows:
             exclude_modules |= {'calibre.utils.iphlpapi', 'calibre.utils.open_with.windows', 'calibre.devices.winusb'}
             exclude_packages |= {'calibre.utils.winreg', 'calibre.utils.windows'}
diff --git a/src/calibre/web/automate/browser.py b/src/calibre/web/automate/browser.py
new file mode 100644
index 0000000000..fd97ea8dac
--- /dev/null
+++ b/src/calibre/web/automate/browser.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+# License: GPLv3 Copyright: 2026, Kovid Goyal <kovid at kovidgoyal.net>
+
+import random
+from collections.abc import Iterable
+from urllib.parse import urlparse
+
+from camoufox.async_api import AsyncCamoufox  # type: ignore
+
+from calibre.constants import ismacos, iswindows
+
+wikipedia_topics = (
+    'Lists_of_deaths_by_year', 'United_States', 'India', 'China', 'United_Kingdom', 'President', 'Red', 'Green', 'Cyan', 'Magenta'
+)
+subreddits = (
+    'funny', 'AskReddit', 'gaming', 'pics', 'worldnews', 'todayilearned', 'Music', 'movies', 'science', 'memes', 'aww',
+)
+bbc_topics = (
+    'news/world', 'news', 'sport', 'business', 'health',
+)
+fox_news_topics = (
+    'us', 'politics', 'world', 'opinion',
+)
+
+
+class Warmup:
+
+    def __init__(self, *forced_urls: str, min_num: int = 2, max_num: int = 3, excluded_domains: Iterable[str] = ()):
+        foxes = tuple(f'https://www.foxnews.com/{x}' for x in random.choices(fox_news_topics, k=2))
+        bbc = tuple(f'https://www.bbc.com/{x}' for x in random.choices(bbc_topics, k=2))
+        wiki = tuple(f'https://en.wikipedia.org/wiki/{x}' for x in random.choices(wikipedia_topics, k=2))
+        reddit = tuple(f'https://www.reddit.com/r/{x}' for x in random.choices(subreddits, k=2))
+        urls = (
+            'https://www.amazon.com/gp/css/order-history?ref_=nav_orders_first',
+            'https://x.com',
+            'https://www.youtube.com',
+            ) + foxes + bbc + wiki + reddit
+        disallow = frozenset(excluded_domains)
+        if disallow:
+            def is_not_excluded(x: str) -> bool:
+                p = urlparse(x)
+                for q in disallow:
+                    if p.hostname.endswith(q):
+                        return False
+                return True
+            urls = tuple(filter(is_not_excluded, urls))
+        self.urls = tuple(random.sample(urls, k=random.randint(min_num, max_num))) + forced_urls
+
+    def __call__(self, br: Browser) -> None:
+        pass
+
+
+class Browser(AsyncCamoufox):
+
+    def __init__(self, headless: bool = True, warmup: Warmup | None = None):
+        os = 'windows' if iswindows else ('macos' if ismacos else 'linux')
+        super().__init__(headless=headless, os=os, humanize=True)