No syntax highlighting in Firefox codespaces

[watchingdogs]

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I have disabled all browser extensions, made sure that in this case the Python VSCode extension was installed, and that it also recognized the code as Python. I don't have any network filtering at the moment. The only characters I have seen highlighted are [ ] { } ( ).

Has anyone else seen this issue? How could I debug this?

[marcgreen]

Same. Used to be able to use FF for codespaces but about 1-2 months ago something changed and (1) codespaces stopped working unless I disabled tracking protection and (2) even after doing that, no syntax highlighting.

[watchingdogs]

Exactly, disabling tracking protection allowed me too to bypass the network error or whatever came up, but I would be still looking at a white wall of code.

[AmateurECE]

I experienced this issue today, on my second use of codespaces. Syntax highlighting works on my machine in Chrome, but fails in Firefox.

[data-spice]

I've seen something similar happen before. It might be related to syntax highlighting not working properly due to a VS Code setting or a language mode mismatch.

Here are a few things you can try:

1. Check the bottom-right corner of VS Code — make sure it says “Python.”
   If not, click it and set the language mode manually.

2. Go to Settings → Files: Associations and check if .py files are correctly linked to python.

3. Try reinstalling or disabling/re-enabling the Python extension.

4. Open the Command Palette (Ctrl+Shift+P) → “Developer: Reload Window” to refresh VS Code.

5. If the problem persists, try opening VS Code with all other extensions disabled using:

   code --disable-extensions