let's just not bother with imports for the content script

manifest.json

@@ -27,7 +27,7 @@
     "content_scripts": [
         {
             "matches": ["*://*.duckduckgo.com/*q=*"],
-            "js": ["scripts/hide-slop.js"],
+            "js": ["scripts/content-script.js"],
             "type":"module"
         }
     ]

pages/action_popup.html

@@ -17,6 +17,4 @@
         <button id="login-button">login</button>
     </form>
     <h2 style="visibility: collapse;" id="login-status">You're logged in.</h2>  
-
-    
 </body>

src/content-script.ts

@@ -1,5 +1,3 @@
-let common: any
-
 class SearchLink {
 
     node: Element
@@ -78,7 +76,7 @@ function check_links(search_links: SearchLink[]) {
         return search_link.target
     })
 
-    common.send_message_to_background({type: "check", urls: urls})
+    browser.runtime.sendMessage({type: "check", urls: urls})
 }
 
 async function backend_message_listener(message: any) {
@@ -97,7 +95,6 @@ async function backend_message_listener(message: any) {
                 link.result = message.result
             }
             break
-
     }
 }
 
@@ -156,17 +153,12 @@ async function onload_handler() {
     setup_result_observer()
 }
 
-import("./common.js").then((module) => {
+// listen for messages from the background script
-    common = module
+browser.runtime.onMessage.addListener(backend_message_listener)
-    // listen for messages from the background script
-    browser.runtime.onMessage.addListener(backend_message_listener)
-
-    // initialize state on document load
-    if (document.readyState === "loading") {
-        document.addEventListener("DOMContentLoaded", onload_handler)
-    } else {
-        wait_for_results().then(onload_handler)
-    }
-})
-
 
+// initialize state on document load
+if (document.readyState === "loading") {
+    document.addEventListener("DOMContentLoaded", onload_handler)
+} else {
+    wait_for_results().then(onload_handler)
+}

tsconfig.json

@@ -7,6 +7,7 @@
         "sourceMap": true,
         "target": "esnext",
         "baseUrl": "src/",
-        "module": "esnext"
+        "module": "esnext",
+        "noFallthroughCasesInSwitch": true
     }
 }