Browser (Chrome) Extensions

A browser extension is the shortest path between a tool you own and a web application you do not. It puts your interface directly inside the page a user already works in, which removes the copy-paste step that most internal tooling never manages to eliminate. Manifest V3 changed how that is built: persistent background pages are gone, remote code execution is banned, and network interception is declarative.

We build extensions to that model rather than around it. Background logic runs in a service worker that can be terminated at any moment, so state lives in storage instead of memory. Content scripts are scoped to the sites that need them. Permissions are requested at the narrowest level that still does the job, because a broad host permission is both a review risk and a real security exposure.

The fragile part of any extension is its relationship with someone else's DOM. We select elements by the most stable signals available, degrade gracefully when a selector stops matching, and report breakage rather than failing silently, so a redesign on the target site becomes a small patch instead of a support queue.

Store review is treated as a design constraint from the start. Permission justifications, a privacy policy that matches actual data flows, no remotely hosted code, and a clear single purpose are all decided before implementation, because rewriting an extension to pass review is far more expensive than building it to pass in the first place.