galacteek is a multi-platform Qt5-based browser and semantic agent for the distributed web. Be sure to install all the gstreamer packages on your system to be able to use the mediaplayer. After opening/mounting the DMG image, hold Control and click on the galacteek icon, and select Open and accept. You probably need to allow the system to install applications from anywhere in the security settings. Docker images are available. They run the full GUI inside a virtual Xorg server (using Xvfb)....
PyBookmark manipulates bookmark files. It can sync files (no server required), merge, sort, remove duplicates, and check links. Its library pybookmarklib provides access to these operations, data structures, and parser for further extensibility.