Pls add this crucial parts.

• preload pages
• scale type
  

Especially Scale type, since the default display of mangayomi is too big, I prefer it follow a default format size then add scale type for users preference.

Also I forgot, there seems to be issue in your extension layout, I can't delete it after I download it, I can only hide it, but I want to delete, anyways great update! keep up the good work!