TB AutoSave extension help Pattern Matching functionality You will want to extract the ASre.txt file to your profile folder ( the same one that contains prefs.js ) The ASre.txt file is in the xpi .. Open the xpi as if it were a zip file.. ( UNIX and MAC USERS NOTE.. The file is a win file, so convert as necessary.. also, edit the paths so they conform to what TB is expecting ) You DO NOT NEED to use the ASre.txt file at all if you do not require regexp pattern matching on saves.. The extension will perform fine without it.. Network Users... The ASre.txt file can be deposited on a network drive *provided* that the pref user_pref("autosave.rulesfilepath is reset to the ASre.txt file's new location ( and the path is written correctly ) Double-click on eml files functionality ... Win users.. to get double click on eml files to work, changes to your windows registry are required for those brave enough to try ( if your machine no longer functions correcly after this.. dont cry to me ) open regedit ( start..run. type regedit) navigate to HkeyClassesRoot..Microsoft Internet Mail Message.. make sure the only keys there are 'DefaultIcon' and 'shell' you do not need to mess with 'DefaultIcon' in 'shell' make sure the only key is 'open' in 'open' make sure the only keys are 'command' and 'ddeexec'.. you do not need to mess with 'ddeexec' in 'command', you should have only one string value ( Type = REG_SZ ) whose name is (Default) and whose Data is: "" -mail "importeml %1" (the " SHOULD BE INCLUDED and spaces are important ) here is mine "C:\PROGRA~1\thunderbird\thunderbird.exe" -mail "importeml %1" now exit regedit and fire up thunderbird ( either by clicking on the normal icon OR by double clicking a .eml file.. UNIX and MAC users.. I am not that clued in on how your systems react to parameters on executables BUT.. all you need to do is fashion the paramters to include -mail "importeml " + emlfile's path+filename NOTE that the autosave extension implements the -importeml parameter so uninstalling the extension will obviously eradicate this functionality Also, this is the first extension I wrote which accesses the exe parameters and the extension does some tricks to make it work, so if it causes issues, please contact me about such.