<blockquote>
<p>firefox - maximize it, open a long page, push the mouse to the right edge, press left mouse button, drag the mouse down - the scrolling works. Try the same with geany - and you cannot just push the mouse cursor to the right side, click and scroll</p>
</blockquote>
<p>So its not that Geany doesn't go fullscreen?</p>
<p>The difference between Geany and friedfox is that in Geany the edit widget with scrollbar is in a horizontal pane and your GTK theme has put a very small but not zero width border on the pane.  The same happens on the left, a mouse pushed right to the edge won't select a line in the symbols but move it in a few pixels and its fine.</p>

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