Because modern browsers have phased out the technologies the original extension relied on, obtaining and running it now requires specific workarounds:
To use this manager, you must bridge the connection between your computer and your BlackBerry device: bb10 / playbook app manager options download
Note the Development IP address shown in the same settings menu (e.g., 169.254.0.1 when connected via USB). Because modern browsers have phased out the technologies
Modern open-source mirrors, such as zhetengbiji/bb10-app-manager on GitHub, offer the source code and installation instructions for users comfortable with manual setups. such as zhetengbiji/bb10-app-manager on GitHub