diff --git a/README.md b/README.md
index 4481a57ed..294b19e30 100755
--- a/README.md
+++ b/README.md
@@ -8,7 +8,8 @@ Install [Greasemonkey](https://addons.mozilla.org/en-US/firefox/addon/greasemonk
 
 You may want to try the [Greasemonkey 2.1 beta](https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/versions/2.1beta1), which fixes bugs in 2.0 that can prevent 4chan X from updating[[1]](https://github.com/greasemonkey/greasemonkey/issues/1938) or, in some versions of Firefox, break posting images from URLs and downloading with the original filename[[2]](https://github.com/greasemonkey/greasemonkey/issues/1937).
 
-**Note**: The combination of Firefox 29 and Greasemonkey 2.0 may cause 4chan X not to work.
+### Known issues
+The combination of Firefox 29 and Greasemonkey 2.0 may cause 4chan X not to work.
 Try [upgrading Firefox](http://www.mozilla.org/en-US/firefox/new/) to version 30 or higher.
 Alternatively, you can downgrade to [Greasemonkey 1.15](https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/versions/#version-1.15) and turn off automatic updates for Greasemonkey ([see pic](https://raw.githubusercontent.com/ccd0/4chan-x/master/img/2014-07-12_16-19-32.png)).
 
@@ -18,6 +19,9 @@ This should also work for non-Windows/dev/canary Chrome and Chromium-based versi
 
 **Note**: The stable and beta releases of Chrome on Windows will disable extensions not installed from the Chrome store, so users will need to install 4chan X from [here](https://chrome.google.com/webstore/detail/4chan-x/ohnjgmpcibpbafdlkimncjhflgedgpam).
 
+### Known issues
+Some recent versions of Chromium (starting at 38.0.2085.0) suffer from a [bug](https://crbug.com/393686) that prevents extensions from making HTTP requests in the usual way. This breaks, among other things, thread updating, quick reply, and, when `JSON Navigation` is enabled, the thread index. Until this is fixed, try another version or a different browser.
+
 ## Other browsers
 This fork of 4chan X is not guaranteed to work correctly in other browsers, but you are welcome to try your luck. Pull requests to fix the bugs you will likely find are always welcome.