rem: gPrefs.setBoolPref("mailnews.display.prefer_plaintext", true); gPrefs.setIntPref("mailnews.display.html_as", 1); gPrefs.setIntPref("mailnews.display.disallow_mime_handlers", disallow_classes_no_html); 
add: gPrefBranch.setBoolPref("mailnews.display.prefer_plaintext", true); gPrefBranch.setIntPref("mailnews.display.html_as", 1); gPrefBranch.setIntPref("mailnews.display.disallow_mime_handlers", disallow_classes_no_html); 
context: function MsgBodyAsPlaintext(){    gPrefs.setBoolPref("mailnews.display.prefer_plaintext", true);    gPrefs.setIntPref("mailnews.display.html_as", 1);    gPrefs.setIntPref("mailnews.display.disallow_mime_handlers",                      disallow_classes_no_html);    MsgReload();    return true;}
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/7cb00076c55ebf89f74d18f62ce8512b7ca5846f/mailWindowOverlay.js/buggy/mailnews/base/resources/content/mailWindowOverlay.js