Google Chrome Extension Numbers on the Icon - Stack Overflow

copy($$('h1,h2,h3,h4,h5,h6')
  .map(h => '\t'.repeat(h.tagName.slice(-1)-1) + 
        '- ' + h.innerText.trim())
.join('\n'))

copy(
  Array.from(new URLSearchParams(window.location.search))
       .map(([key,val]) => `${key}: ${val}`)
       .join("\n")
)

document.designMode = 'on'

const storage = {
   async set(key, value){
      return new Promise(resolve => {
         chrome.storage.local.set({[key]: value}, (a) => resolve(a[key]))
      })
   },
   get(key){
      return new Promise(resolve => {
         chrome.storage.local.get([key], (a) => resolve(a[key]));
      })
   }
}

function getActiveTab(){
   return new Promise((r, reject) => {
      chrome.tabs.query({
         active: true,
         lastFocusedWindow: true,
      }, (tabs) => {
         if (tabs.length){
            r(tabs[0]);
         } else {
            chrome.tabs.query({}, tabs => {
               if (tabs.length){
                  if (tabs.length === 1){
                     r(tabs[0]);
                  } else if (tabs.find(i => i.active)){
                     r(tabs.find(i => i.active))
                  } else {
                     reject("No tab found");
                  }
               } else {
                  reject("No tab found");
               }
            })
         }
      })
   });
}

const permissions = {
   async add(permission = [], origins = []){
      if (!origins?.length){origins = undefined};
      if (typeof permission === "string"){permission = [permission]};
      return new Promise((r, reject) => {
         chrome.permissions.request(
            {permissions: permission, origins},
            (granted) => {
               if (!granted){
                  reject("Permission not granted");
               } else {
                  r();
               }
            }
         )
      })
   },
   async remove(permission = [], origins = []){
      if (!origins?.length){origins = undefined};
      if (typeof permission === "string"){permission = [permission]};
      return new Promise((r, reject) => {
         chrome.permissions.remove(
            {permissions: permission, origins},
            (removed) => {
               if (!removed){
                  reject("Permission not removed");
               } else {
                  r();
               }
            }
         )
      })
   },
   async with(permission = [], origins = [], func){
      if (!origins?.length){origins = undefined};
      if (typeof permission === "string"){permission = [permission]};
      await new Promise((r, reject) => {
         chrome.permissions.request(
            {permissions: permission, origins},
            (granted) => {
               if (!granted){
                  reject("Permission not granted");
               } else {
                  r();
               }
            }
         )
      });
      let out = await func();
      await new Promise((r, reject) => {
         chrome.permissions.remove(
            {permissions: permission, origins},
            (removed) => {
               if (!removed){
                  reject("Permission not removed");
               } else {
                  r();
               }
            }
         )
      })
      return out;
   },
}

chrome.browserAction.setBadgeText({text: "10+"}); // We have 10+ unread items.