Android ROM developer CyanogenMod is working on Gello, an open-source browser based on Google’s Chromium project that includes loads of customization options.
Early demo videos show features from the current build that may or may not make it to the final version, including an offline reading mode, immersive and night modes, site-by-site settings for privacy and security and the ability to save downloads in a preferred location and name files before saving them.
