begin the source maps branch

.gitignore

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+config.json
+ignored
+.idea/
+node_modules
+web-ext-artifacts
+.vscode/
+dist/
+tmp/
+.DS_Store
+ci/invidious_instances.json
+ci/piped_instances.json
+test-results

README.md

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+# Source maps for SponsorBlock
+
+This branch contains an archive of extension source maps since they were enabled for production builds.
+Source maps for old extension versions may be deleted in the future.
+
+This branch is completely separate from the master branch and all other development branches - [see the master branch to view the latest source code](https://github.com/ajayyy/SponsorBlock/tree/master).
+
+The directory structure of this repository is as follows:
+```
+/
+├── chrome
+│   └── <version>
+│       └── .js.map files
+├── chrome-beta
+│   └── <version>
+│       └── .js.map files
+├── edge
+│   └── <version>
+│       └── .js.map files
+├── firefox
+│   └── <version>
+│       └── .js.map files
+├── firefox-beta
+│   └── <version>
+│       └── .js.map files
+└── safari
+    └── <version>
+        └── .js.map files
+```
+
+This structure is also served with GitHub Pages at https://ajayyy.github.io/SponsorBlock/ - this is where the extensions will be attempting to fetch the maps from.