Fix: inject all scripts

background/background.js

@@ -268,12 +268,14 @@ window.addEventListener('storageReady', function _() {
 
   const injectCS = (cs, tabId) => {
     ignoreChromeError();
+    for (const file of cs.js) {
       chrome.tabs.executeScript(tabId, {
-      file: cs.js[0],
+        file,
         runAt: cs.run_at,
         allFrames: cs.all_frames,
         matchAboutBlank: cs.match_about_blank,
       }, ignoreChromeError);
+    }
   };
 
   const pingCS = (cs, {id, url}) => {