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distrobox
Use any linux distribution inside your terminal. Enable both backward and forward compatibility with software and freedom to use whatever distribution you’re more comfortable with. Mirror available at: https://gitlab.com/89luca89/distrobox
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Distrobox (https://github.com/89luca89/distrobox) recently caught my attention, haven't gotten to test it yet. For locking something into a container ot should do the job quite well.
And of course: Tor Browser (https://www.torproject.org/download/) is always worth a shot. They already do a lot of what you are trying to do, such as disabling JS, hide your IP and fake screen geometry. And since it is download, unzip, run you cam have as many different "instances" as you want - just unpack them multiple times.