I am Google Chrome and firefox extension developer working in this field since last 3 years. I have completed different small/large scale extensions. Following extensions we have created so far: 2) Created Simple Cookie Import/Export Extension which is live on firefox webstore with 1,00,000 downloads. Here is link https://addons.mozilla.org/en-US/firefox/addon/cookie-import-export/ 3) Created Miltiple Cookie manager which can store muiltiple logins on all websites and user can easily switch between profiles. 4) Created custom(isolated from original bookmark bar provided by google chrome/firefox) bookmark bar. where user can add/update/delete/export/import his bookmarks to different browser. 5) Created extension that shows statustics fetched from API. and it also mantain user login. And it also provide push notification to user. 6) Crated Search Extendor for Fetlife.com. Fetlife do not provide advance serach but i created script that allow user to do advance serach. (by reading fetlife search result and parsing it on javascript and filtering. ) 7) Created Whatsapp Contact extracotr. That extract contacts from whatsapp web by clicking one button. it can extract contacts from Chat, groups, saved contacts, broadcast, Labels. 8) Created Email/Mobile number scrapper from google search. It extract Email/mobile number for specific keyword on google search in one click. 9) Created E-commerce Order exporter. It scans B2C Ecommerce website like Amazon, AliExpress, Ebay, Gearbest.. and extract all orders of currently logged in user and extract them to excel with images. 10) Created Extension that Transfer logs browser history on backend server using api calls uniquly for different users. 11) Created Login Saver. that saves username and password entered by user on configured sites and that logins are saved to backend server. that extension was created for education purpose for one of my client. 12) Created Extension that auto post advertisement on website called (tutti). It executes 6 steps for posting advertizement automatically with just one clie. 13) Created Extension for automating request submission for creating user portfolio for share market company. 14) Created Extension for showing statstics and push notification for chrome extension integrated with task management system created in ASP.NET. 15) Created Extension for Auto follow for instagram. 16) Created Extension for Auto Post like on facebook. 17) Created Extension that Auto add friends on facebook. 18) One of largest project is Facebook Account manager. That manages N number of accounts and add friends on all accounts one by one and at end of day when friends are added it auto invites friends to specific page at end of day.