update default value for Content Analysis AllowUrlRegexList again

diff --git a/docs/index.md b/docs/index.md
index 3e5e982d96f745a04ae02d72ce828fdb95b24a67..d3a773af605eb7bd41f7dc0dab2d62d84d4ae2a8 100644 (file)
--- a/docs/index.md
+++ b/docs/index.md
@@ -1127,7 +1127,7 @@ Configure Firefox to use an agent for Data Loss Prevention (DLP) that is compati
 
 `AgentTimeout` is the timeout in number of seconds after a DLP request is sent to the agent. After this timeout, the request will be denied unless `DefaultResult` is set to 1 or 2. The default is 30.
 
-`AllowUrlRegexList` is a space-separated list of regular expressions that indicates URLs for which DLP operations will always be allowed without consulting the agent. The default is "^about:.*", meaning that any pages that start with "about:" will be exempt from DLP.
+`AllowUrlRegexList` is a space-separated list of regular expressions that indicates URLs for which DLP operations will always be allowed without consulting the agent. The default is "^about:(?!blank|srcdoc).*", meaning that any pages that start with "about:" will be exempt from DLP except for "about:blank" and "about:srcdoc", as these can be controlled by web content.
 
 `BypassForSameTabOperations` indicates whether Firefox will automatically allow DLP requests whose data comes from the same tab and frame - for example, if data is copied to the clipboard and then pasted on the same page. The default is false.