--- mtpaint-3.19/src/png.c~ 2007-11-11 16:48:32.000000000 +0100 +++ mtpaint-3.19/src/png.c 2007-12-16 23:33:19.000000000 +0100 @@ -3990,7 +3990,7 @@ #else /* Linux */ -#define HANDBOOK_BROWSER "firefox" +#define HANDBOOK_BROWSER "xdg-open" #define HANDBOOK_LOCATION "/usr/doc/mtpaint/index.html" #define HANDBOOK_LOCATION2 "/usr/share/doc/mtpaint/index.html"