To hopefully solve your browser spinning-beachball problem at developer.apple.com, the browsers-for-older-systems market has had a lot of activity lately.
For 10.7 (and probably 10.7 to 10.9) the nicest, most capable one I have seen lately is a legacy version of Chromium that seems to work really well -- supports async/wait and all the needed protocols. Github works normally, as do all the other websites. There is a minor window-resizing graphics glitch that is not a problem for me -- just a brief flash. Jonathan made a downloader/installer available that is nice: https://jonathanalland.com/downloads/chromium-legacy-downloader.zip I use it every day on 10.7. Ken
