Source map warning on Next 15.2.4 with turbopack, Windows, Firefox

[pburrows]

Link to the code that reproduces this issue

https://github.com/altbdoor/nextjs-sourcemap-warning-firefox-reproduction

To Reproduce

Create a base reproduction template with npx create-next-app -e reproduction-template
Name the project as test-ground
cd test-ground
npm run dev -- --turbo
Open http://localhost:3000/ in Windows Firefox
Get warning on source map error

Current vs. Expected behavior

Source map error: Error: Invalid URL: file://C%3A/Users/carbon/projects/test-ground/node_modules/next/src/client/app-bootstrap.ts
Stack in the worker:URLImpl@resource://devtools/client/shared/vendor/whatwg-url.js:22:13
setup@resource://devtools/client/shared/vendor/whatwg-url.js:537:14
URL@resource://devtools/client/shared/vendor/whatwg-url.js:246:18
createSafeHandler/<@resource://devtools/client/shared/vendor/source-map/lib/util.js:181:17
computeSourceURL@resource://devtools/client/shared/vendor/source-map/lib/util.js:437:22
BasicSourceMapConsumer/</that._absoluteSources<@resource://devtools/client/shared/vendor/source-map/lib/source-map-consumer.js:213:23
BasicSourceMapConsumer/<@resource://devtools/client/shared/vendor/source-map/lib/source-map-consumer.js:212:33

Resource URL: http://localhost:3000/_next/static/chunks/node_modules_next_dist_client_239c40._.js
Source Map URL: node_modules_next_dist_client_239c40._.js.map

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Pro
  Available memory (MB): 16206
  Available CPU cores: 12
Binaries:
  Node: 22.11.0
  npm: 10.9.0
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 15.2.0-canary.31 // Latest available version is detected (15.2.0-canary.31).
  eslint-config-next: N/A
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.7.3
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

Turbopack

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

This is the same issue as this:
#73384

It was inappropriately closed and has dozens of comments on how to reproduce it. Please do not close this issue again, it is highly annoying. The reproduction steps are complete.