When Firefox process starts cold, and when internet connection is not available, Firefox displays Server Not Found error page instead of loading a cached copy of a file. This is really frustrating for example when you find something to read, then send Firefox to background, and try reading it on the metro, only to encounter a Server Not Found error.
Today I discovered a hack that could make it work. I wonder if there is any option to just have Firefox on Android display cached version, maybe with a warning that that’s a cached copy?