If I disable the danish language in FF the bug is gone.
It looks like the window size is increased because there isn't enough room for the danish text: "Bunden af siden blev nået, ..." (in english: End of page is reached... (or something like that)). See attached screenshot.
If I disable the danish language in FF the bug is gone.
It looks like the window size is increased because there isn't enough room for the danish text: "Bunden af siden blev nået, ..." (in english: End of page is reached... (or something like that)). See attached screenshot.