Sudden problem with Google filters in Firefox

[flyingbeetle]

Ok. I deleted the whole "Headers" section from the configuration file and tried again. The problem persisted (clicking on an rsult on the second results page yields a 404. After restoring the configuration file, I deleted the whole "Patterns" section and suddenly Google worked again. In my opinion, this means that one or more of the filters of the "Web page" ("Patterns") section cause the problem, but not the Google filters themselves (please compare my last posts).

Best
Thomas