wip initiate dev environment

src/addons/thunderbird/web-ext-config.cjs

@@ -0,0 +1,30 @@
+// web-ext-config.cjs
+const os = require("os");
+const path = require("path");
+
+function thunderbirdBinary() {
+  if (process.env.WEB_EXT_FIREFOX) return process.env.WEB_EXT_FIREFOX;
+  switch (process.platform) {
+    case "darwin":
+      return "/Applications/Thunderbird Beta.app/Contents/MacOS/thunderbird";
+    case "linux":
+      return "/usr/bin/thunderbird"; // adjust to your install
+    case "win32":
+      return "C:\\Program Files\\Mozilla Thunderbird\\thunderbird.exe";
+    default:
+      throw new Error("Unsupported platform: " + process.platform);
+  }
+}
+
+module.exports = {
+  sourceDir: "./src",
+  artifactsDir: "./web-ext-artifacts",
+  run: {
+    firefox: thunderbirdBinary(),
+    firefoxProfile: path.join(os.homedir(), ".thunderbird-dev-profile"),
+    profileCreateIfMissing: true,
+    keepProfileChanges: true,
+    browserConsole: true,
+  },
+  ignoreFiles: ["package-lock.json", "web-ext-config.cjs", "*.md"],
+};