We have updated our manual alignment interface in order to make it more cross-browser compatible. Although Google Chrome and Opera are our preferred browsers, now the manual alignment also works decently with Internet Explorer and Firefox. More details about browser compatibility is available on this Github document.
Yes, we have published our code on Github! There are two main repositories. The first repository, eunlp, contains the Python package running in the belly of this website and aligning those long EU documents. The second repository, jsalign, contains the code necessary to manually edit the alignments (you know, the HTML file spitted out by the Celex aligner).
Happy New Year 2018!