I wrote a Firefox Search Addon, that will do the Job: GoogleAllintext
this is the source code:
<?xml version="1.0" encoding="UTF-8"?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
<ShortName>GoogleAllintext</ShortName>
<LongName>Search for all words in Google</LongName>
<Description>Search for all words in Google</Description>
<Image type="image/vnd.microsoft.icon" height="16" width="16">http://g-cdn.serienjunkies.de/favicon.ico</Image>
<Developer>www.coffeeplusplus.z11.de</Developer>
<Url type="application/opensearchdescription+xml" template="http://coffeeplusplus.z11.de/opensearch.xml" />
<Url type="text/html" rel="results" template="https://www.google.com/search?q=allintext:{searchTerms}" />
<Query role="example" searchTerms="Fringe" />
</OpenSearchDescription>