Hi
I'm an experienced developer having completed over 35 projects related to browser extensions including Chrome, Firefox, Opera, Safari and IE. Please have a look at my profile to see the projects that I've completed. A few of the extensions are also hosted on the Firefox add-on store and Chrome App store.
I can develop both the Chrome & Firefox extensions for you but I'd need more details about the project first. If you could share your website link and show what exactly you expect from the extension, it would help me get a better understanding of the project.
I have the skills and the experience to work on your project and have completed all the projects till now(except where the employer failed to pay after delivery and it shows as incomplete). Being confident to deliver your project in time, I look forward to more details from you.
Thanks