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Firefox add-on ID in manifest before session-dependent APIs

Set the Firefox add-on ID in `manifest.json` early if the extension depends on stable identity, because temporary IDs reset across sessions and break more than most teams expect.

rare tactic free budget Product, Developer Experience, Retention Stages: browser extensions, firefox add-ons, manifest architecture, identity stability

Why this can grow a startup

A lot of extension teams discover the add-on ID too late, after sync, redirect, or native-messaging behavior starts acting haunted in development. Mozilla's guidance is useful because it turns the ID into an early architecture choice instead of a release footnote. When the ID is set from the start, the same extension identity can survive development, signing, and production updates. That makes debugging cleaner and keeps session-dependent flows from changing shape every time Firefox restarts.

Ian's take

From scaling consumer platforms across MENA and Southeast Asia, my default is to distrust growth work that only looks good in a slide. My bias is to treat this as a small market test first. Make the audience narrow, make the promise concrete, and let the first real response decide whether it deserves more work. I would run it small enough to learn quickly, then only scale the parts that real users repeat, save, reply to, or buy from. For this tactic, I would watch one clear growth signal before putting more time or budget behind it.

Action plan

  1. Define one narrow startup segment where firefox add-on id in manifest before session-dependent apis can create a measurable lift.
  2. Turn the tactic into one offer, page, campaign, or workflow for the Product and Developer Experience channel.
  3. Use the evidence from extensionworkshop.com to set the first version of the message, format, and audience.
  4. Launch a small test for 7 to 14 days with one success metric: one measurable growth signal.
  5. Review the result, keep the winning message, remove weak variants, and turn the learning into a repeatable growth playbook.

Source-backed example

Firefox Extension Workshop recommends defining an extension ID in `manifest.json` when development begins, requires a Manifest V3 extension ID before submission to AMO, and notes that temporary IDs change when Firefox restarts if no ID is defined.

Source: Firefox Extension Workshop: Extensions and the add-on ID (extensionworkshop.com)

GrowthDex source hub: Firefox Extension Workshop: Extensions and the add-on ID

Last checked: 2026-06-07T05:06:41.503Z

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Ian Goh has helped grow consumer platforms across Southeast Asia, India, and MENA. His work includes scaling Tiki to 100M+ users, doubling BIGO's MENA revenue in 7 months, and increasing OYO's direct booking share across 6 Southeast Asian markets.

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If you want someone to pressure-test this against your real market, Ian works with founders on growth, market entry, and operator-led distribution.

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