VSCodium is VSCode without "Telemetry" (Tracking!)
"Microsoft’s vscode source code is open source (MIT-licensed), but the product available for download (Visual Studio Code) is licensed under this not-FLOSS license and contains telemetry/tracking."
https://vscodium.com

Either grab the latest release from: https://github.com/VSCodium/vscodium/releases
Or follow the download/install instructions on the website. e.g: on Mac:
brew cask install vscodium
Output
==> Verifying SHA-256 checksum for Cask 'vscodium'.
==> Installing Cask vscodium
==> Moving App 'VSCodium.app' to '/Applications/VSCodium.app'.
==> Linking Binary 'code' to '/usr/local/bin/code'.
🍺 vscodium was successfully installed!
If you see the following warning:

Open the Security & Privacy tab in your System Preferences and click "Open Anyway":

The next time you open the app you will see:

Click on "Open" to continue opening VSCodium
You will see:

VSCodium is compatible with all the plugins/extensions that you know and love in VSCode.
Just install and VSCodium and pickup exactly where you left off.
using the code shortcut in your terminal will open VSCodium e.g:
code .
No more tracking from Microsoft. 🎉
One thing that I've found annoying about Vscodium is for some reason the Elixir Language Support (syntax highlighting and formatting) is not available when searched for in the extensions search:

It means my Elixir code looks like this lame grey:

It appears that VSCodium has a separate extensions library so it does not display the default ones. More detail + instructions available in: https://github.com/VSCodium/vscodium/blob/master/DOCS.md#extensions-marketplace

"Modify the
extensionsGallerysection of theproduct.jsonfile" ...
I searched for "product.json vscodium":

The results were useless so I kept refining (adding detail) to my query: "where is product.json in vscodium" and obviously the results were still useless.

So I went digging in finder on my Mac ... 📁 🔍
But I did not find a product.json file ... 😞
Apparently the brew version is a compiled binary so there is no product.json file ...
See: https://stackoverflow.com/questions/44057402/using-extensions-in-compiled-vscode
What I did find were the extensions for both .vscode (the Microsoft one that tracks your keystrokes!)
and .vscode_oss (VSCodium)

To get back to this, simply open your terminal and type:
cd ~/
That will take you to the "home" directory of your "user" on the OS.
If you ls (list the contents of the directory), you will see both .vscode and .vscode-oss (VSCodium):

I simply copied over the extensions from ~/.vscode/extensions to ~/.vscode_oss/extensions
cp -R ~/.vscode/extensions/* ~/.vscode_oss/extensions
and that gave me Elixir Syntax highlighting: 🎉

This is obviously not a good longterm solution and it won't work for people who haven't previously used VSCode. So we still need a more robust solution. 💭 I'm going to get back to my code for now, but if I ever need to install just VSCodium on a new computer, I will investigate this further. 👍
Found it! Open your terminal/iTerm and go to:
cd /Applications/VSCodium.app/Contents/Resources/app
ls -lath
Edit the file using VSCodium:
code product.json
If you search for "extensionsGallery" you should see:

Replace:
"extensionsGallery": {
"serviceUrl": "https://open-vsx.org/vscode/gallery",
"itemUrl": "https://open-vsx.org/vscode/item"
},
With:
"extensionsGallery": {
"serviceUrl": "https://marketplace.visualstudio.com/_apis/public/gallery",
"itemUrl": "https://marketplace.visualstudio.com/items"
},
So you now have this:

After restarting VSCodium, if we open the Extensions Marketplace:

If you search for your favourite extension or programming language, you will see all of them:

Attempting to launch/run VSCodium from terminal with code or codium but get:
zsh: command not found: code
or
zsh: command not found: codium
according to https://github.com/VSCodium/vscodium/issues/190#issuecomment-500707708 open the Command Palette: ⇧⌘P (Shift Apple P)

Type: "install cod" and press the Enter key to activate the command:

Now in your terminal, you can type codium . to start the VSCodium program with the CWD as the project.
Just tried setting up on a new mac and got the following error:
/usr/local/bin/code: line 6: python: command not found
/usr/local/bin/code: line 10: ./MacOS/Electron: No such file or directory
Going to do a bit of Googling ... 🔍
Known issue: https://github.com/microsoft/vscode/issues/141738 Hot fix solution: https://github.com/microsoft/vscode/issues/141738#issuecomment-1029507799
vi /usr/local/bin/code
change python => python3 on the following line
- function realpath() { python -c ...
+ function realpath() { python3 -c ...
using python3 works. ✅
The last comment in the thread is actually a more elegant solution: https://github.com/microsoft/vscode/issues/141738#issuecomment-1070966278
I had python3 installed through brew so I simply ran:
ln -s /opt/homebrew/bin/python3 /opt/homebrew/bin/python
@nelsonic This issue has been so helpful, thank you!
I got the same but without the Open option (when installing with homebrew on mac brew install --cask vscodium):
So you have to go to System Preferences and you should see the blocked app:
Clicking on Open Anyway gets you this pop-up:
And here you can click on Open and get access to VSCodium 👌
Glad you were able to get it working. 👩💻⭐️