@nyaasar - I already tried in the past years to customize it, but everytime i back to the legacy one because 1) settings aren't saved and my browser delete the cookies on exit and 2) the side interface, page resizing, loading images are heavy and unpractical.
Regarding your first question, i reply below in detail:
- Chapter pages are loaded at once
- Cause pages are loaded at once i was able to dowbload all the pages through firefox build-in media feature and save them to my pc (you know, i like to collect some manga)
- Interface was very simple and you don't have to manage 20 options to remove all the useless crap the new interface have
- pressing the mouse button go to the new chapter, the new reader instead go to to the next page and rotate in a infinite loop to the start
- at the bottom of each chapter there is the chapter discussion button, to do so in the new reader i need to press the arrow to make the gui reappear and then press the discussion button
- resizing pages more large than your browser layout was automatic, you do not need to set anything, in this new reader by default the pages are all resized in the right side, you need to scroll it with arrows keys or mouse key to read it, using the container option it surely resize the whole pages but resizing is too small, it seems there is something hidden on the right and left side that prevent the correct page streching
- in the new reader pages take more time to load because of the round smartphone icons with useless animations
- is more heavy and slow to load since it have to preload all these new gui elements and scripts
tl;dr Legacy reader was simple, instant to load without any options, the settings were stored in the database and not cookie based, since there is no menù it have the correct centered resizing images base on the browser layout.
Tha'ts all and why i love the legacy reader.