tridactyl/src/tsconfig.json

{
  "compilerOptions": {
    "noImplicitAny": false,
    "noEmitOnError": true,
    "outDir": "../build",
    "target": "ES2017",
    "lib": ["ES2017","dom"],
    // Use the local copy, or a system installed version.
    "typeRoots": ["@types", "node_modules/web-ext-types/", "/usr/lib/node_modules/web-ext-types"]
  }
}