VS Code extension for Firefox Profiler

[nisargjhaveri]

I've started with a working prototype for extension to use embedded Firefox Profiler in VS Code here: https://github.com/nisargjhaveri/vscode-firefox-profiler

The extension would eventually have the following functionalities:

• Opening any file in Firefox Profiler in embedded view.
• "Save as" option for the opened profile, from VS Code's entry points.
• Ability to programatically opening profiler directly for some file without user intervention.
• Listing uploaded profiles using https://profiler.firefox.com/uploaded-recordings/
  • Optionally disabling uploads using some preference

Here is a list of issues that are required to make it work, listing here for tracking, will add more if anything else important comes up:

• Remove frame-ancestors CSP to allow embedding via iframe #5170 - Absolutely required to make it load in VS Code
• Use postMessage to open external links from sandboxed iframe #5223 - Required for basic functionalities like Docs link or lookup in searchbox.
• Remove "Back to home" link on import error when using /from-post-message #5222 - Required to align with basic user expectation in embedded setup
• Allow removing "Upload Local Profile" option from the top bar #5193 - Nice to have to align better with user expectation in file based environment.

Feel free to share any thoughts around this. Happy to take suggestions and changes as required.

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