diff --git a/package.json b/package.json
index a5060cba..141d40cd 100644
--- a/package.json
+++ b/package.json
@@ -47,6 +47,7 @@
     "install_manifests": "nvim --headless -u NORC -i NONE -n -c \":set rtp+=.\" -c \"call firenvim#install(1)\" -c \"quit\"",
     "jest": "jest",
     "nyc": "nyc",
+    "lint": "addons-linter target/xpi/firefox-latest.xpi",
     "pack": "web-ext build --source-dir target/firefox --artifacts-dir target/xpi --overwrite-dest",
     "tests": "npm run test-firefox && npm run test-chrome",
     "test-firefox": "webpack --env=firefox-testing && nyc instrument --in-place target/firefox && web-ext build --source-dir target/firefox --artifacts-dir target/xpi --overwrite-dest && jest firefox",
diff --git a/src/FirenvimElement.ts b/src/FirenvimElement.ts
index b3fa4143..c3f49dbe 100644
--- a/src/FirenvimElement.ts
+++ b/src/FirenvimElement.ts
@@ -184,7 +184,7 @@ export class FirenvimElement {
         })(this));
         this.resizeObserver.observe(this.getElement(), { box: "border-box" });
 
-        this.iframe.src = (browser as any).extension.getURL("/index.html");
+        this.iframe.src = (browser as any).runtime.getURL("/index.html");
         this.span.attachShadow({ mode: "closed" }).appendChild(this.iframe);
 
         // So pages (e.g. Jira, Confluence) remove spans from the page as soon