{{msg-mw|Fogg-installed|notext=yes}}

Hmm not checked, but now. And it seems unused. Maybe doublecheck because I am not very familar with JS

Raymond20:13, 15 May 2010

Not used indeed:

mw.Firefogg.js: "fogg-installed" : "Firefogg is installed.",
mw.Firefogg.js: "fogg-not-installed" : "Firefogg is not installed or not enabled.",
mw.Firefogg.js: // CSS selector for the "firefogg is installed" message div
mw.Firefogg.js: 'target_installed': false,
mw.Firefogg.js:                 gM( 'fogg-for_improved_uploads' ) + ' ' : gM( 'fogg-not-installed') + ' ';
Siebrand20:21, 15 May 2010