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$
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I will develop firefox extension chrome browser extension script and edge plugin addons
Evelin
About this gig
DEVELOP CUSTOM BROWSER FIEEFOX EXTENSION WITH AUTOMATION AND API
Need a custom Firefox extension that actually fits the way you work?
Are you looking to automate a repetitive task, connect an API, simplify a workflow, or turn an idea into a useful Firefox addon? Maybe you already have an extension that needs fixing, modifying, or improving.
You're in the right place.
I develop custom Firefox extensions and browser-based tools for businesses, creators, and individuals,
What I can do for you:
- Custom Firefox extension development
- Firefox addon development and customization
- Firefox browser automation
- API and third-party service integration
- DOM and content-script functionality
- Browser-based productivity tools
- Extension bug fixing and modification
- Manifest V3 extension updates
- Chrome and Edge compatibility where required
Why choose me?
- Focused on practical browser extension solutions
- Clean, efficient, and maintainable implementation
- Clear communication throughout the project
Have an idea for a Firefox extension? Send me the concept, features, or example you have in mind, and let's turn it into a working tool.
Message me so we can discuss your requirements and get started.
Get to know Evelin
Evelin
CUSTOM BROWSER EXTENSIONS CHROME FIREFOX EDGE
- FromGermany
- Member sinceSep 2026
Languages
German, English, French, Arabic
SMART TOOLS. SMOOTHER WORKFLOWS. LESS REPETITION. Turn a browser-based idea into a practical extension built around the way you work. From Chrome to Firefox and Edge, I create custom solutions for automation, APIs, productivity, data handling, and tailored workflows. Whether it’s a focused tool or a more advanced extension, the goal stays simple: useful functionality, clean execution, and an experience that works the way you need it to. I focus on clean execution, smooth usability, and reliable results. Tell me what you want your extension to do, and let's turn it into something useful.
Other Software Development Services I Offer
FAQ
WHICH BROWSERS CAN YOU DEVELOP EXTENSIONS FOR?
I can develop extensions for Chrome, Firefox, and Microsoft Edge. Cross-browser development can also be discussed based on your requirements.
CAN YOU BUILD A CHROME EXTENSION FROM SCRATCH?
Yes. I can develop a custom Chrome extension based on your idea, workflow, features, and required functionality.
DO YOU WORK WITH MANIFEST V3?
Yes. I can develop and update Chrome extensions using the current Manifest V3 architecture where applicable.
CAN YOU INTEGRATE AN API INTO MY EXTENSION?
Yes. API integration can be included when you provide the relevant API documentation and access requirements.
CAN YOU CREATE A CUSTOM INTERFACE FOR THE EXTENSION?
Yes. I can create a practical custom interface based on the functionality and user experience you need.
