(difficulty: easy, requires IE 9, IE 10 and IE 11) Open IE 9; Press <F12>: click on the Network tab and press Start capturing ; Browse the home page of Moodle using e.g. the standard theme; Check that the SVG-served icons are served by looking at the Type column in the Network tab and by zooming in (at least 350%, use <CTRL +>) the Navigation block to look for no blurring with the SVG-served icons; Press <F12>: hit Browser Mode to select the Compatibility View and hit the same page by pressing <CTRL F5> to reload (and refresh) the home page. Check for the blurring of the icons, previously served as SVG, now served as PNG: they will be blurred but visible. No image/svg+xml must appear in the Type column; Repeat the same steps for IE 10 and IE 11: the SVG-served icons must be present in both modes, native and Compatibility View .