User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20060918 Firefox/2.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20060918 Firefox/2.0 I've just detected that the spell checker of FF 2.0 uses it's own copy of dictionaries placed in the <FF>/dictionaries/ subfolder. Thunderbird on the other hand stores them in <TB>/components/myspell. (Needless to say that each program saves the personal dictionaries at their own places, resulting in the user adding over and over again the same words to dictionaries.) Isn't it possible to share at least those common runtime infrastructure (like spell checking or the gecko engine) that are used by all apps of the mozilla platform (firefox+thunderbird at least) in a common place? Similar: There's bug 310285 about sharing dictionaries between TB and OpenOffice. Reproducible: Always

Not a bad idea, should be in Core though.

Sorry, that was a mistake. Bug 226699 is about personal dictionaries. This is about sharing the main dictionary between Firefox and Thunderbird.