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We'll have 2 presentations at this month's meeting, both from der.hans. Federated Microblogging with Mastodon & uMatrix for webbrowser protection 

der.hans: uMatrix for webbrowser protection

Description:
uMatrix is a webextension security and privacy add on for Firefox.
Via a simple interface uMatrix allows personal rules for website cookies, JavaScript, CSS, pictures and video.
uMatrix uses and maintains per site allowlists and blocklists. For example, you can allow cookies, JavaScript, CSS and images for www.example.com and only CSS and images from cdb.example.com while blocking everything from spies.exampleduplicate.com.
Attendees will know what the web components are that uMatrix controls, how to use the uMatrix GUI interface and save rules.

der.hans: Federated Microblogging with Mastodon

Description:
Mastodon is a decentralized, open source social network. It implements ActivityPub for compatibility with other federated services such as Plume blog engine, PixelFed picture sharing service and PeerTube video sharing service.
Mastodon has per message privacy controls. Each message can be fully public, unlisted, private of direct.
Mastodon also gives you multiple options to block content, accounts or even complete domains.
Since Mastodon is federated there are many servers. Choose the independently-operated service that meets your needs. Like email, you aren't limited to just members of that particular service. You can even install your own instance.
Mastodon posts are limited to 500 characters and intentionally do not have rich text. It's for microblogging :).

Biography:
der.hans is a Free Software community veteran, presenter and author. He is the founder of the Free Software Stammtisch, BoF organizer for the Southern California Linux Expo (SCaLE) and chairman of the Phoenix Linux User Group (PLUG).
As a technology and entrepreneurial veteran, roles have included director of engineering, engineering manager, IS manager, system administrator, community college instructor, developer and DBA.
He presents regularly at large community-led conferences (SCaLE, SeaGL, LibrePlanet, LFNW) and many local groups.