chromegoldmine.com

Chrome Goldmine is a paid database of 9,656 expired Chrome extensions, packaged as a Notion workspace plus CSV, aimed at indie developers looking for extensions to rebuild. Each listing includes historical user counts, category, rebuild difficulty, why the extension died, current competitors, and a step-by-step rebuild plan. It costs $23.20 during a launch discount for the first 100 buyers, then $29, with a 30-day money-back guarantee and lifetime quarterly updates. It is not a tool for building extensions — it is research you buy before you decide what to build.

What you actually get

The product is a research database, not software. According to the site, each of the 9,656 listings covers:

• Historical users — how many people had installed the extension before it died
• Category — one of 6 categories (sample rows show Productivity, Accessibility, Customization, Shopping, Writing, and New Tab)
• Rebuild difficulty — rated Low, Medium, or High
• Why it died — for example "MV3" (Manifest V3 migration) or "Abandoned"
• Who competes now — current alternatives in the space
• A step-by-step rebuild plan — the site describes a 12-point report per listing
• Estimated monthly revenue — a range, e.g. $500–$1,600/mo

Delivery is an instant Notion workspace plus a CSV export, with lifetime quarterly updates.

The sample data tells you what a listing looks like

The site publishes 20 live rows out of 9,656 without requiring signup. A few examples:

One full report (Session Stack) is shown in the sample; the remaining 9,636 rows unlock at checkout. The revenue figures are the seller's estimates, not verified earnings — treat them as a starting point for your own validation.

Who it fits, and who it doesn't

It fits you if:

• You're an indie developer or solo maker choosing what to build next
• You want demand signals (historical installs) rather than guessing at ideas
• You're comfortable rebuilding a Chrome extension in Manifest V3
• You'd rather pay once for research than spend weeks scanning the Web Store yourself

It doesn't fit you if:

• You want a done-for-you extension or code — this is research only
• You need guaranteed revenue; the estimates are ranges, not promises
• You're not willing to do the build and launch work yourself

The site says the database is used by 50+ indie makers.

Pricing and what the money buys

• $23.20 — 20% launch discount, limited to the first 100 buyers
• $29 — standard price after that
• No subscription
• 30-day money-back guarantee, described as "no questions"
• Lifetime quarterly updates included

The site does not state whether the Notion workspace requires a paid Notion plan, so check that separately if you don't already use Notion.

How to evaluate it before buying

1. Open the free sample (20 rows plus one full report) — no signup required.
2. Pick 2–3 listings in categories you know and check whether the "who competes now" and rebuild plans match what you'd find on your own.
3. Compare the historical user counts against current Web Store install numbers for the live competitors.
4. If the sample research saves you meaningful time, the full set is the same format at scale.

The core decision is simple: if you're picking your next extension and want pre-gathered demand data, the sample shows you the quality bar. If the sample rows don't tell you anything you couldn't find yourself in an afternoon, the full database likely won't change that.

Yes. Chrome Goldmine lets you browse a free sample of 20 live rows from its database of 9,656 expired Chrome extensions, with no signup required. The sample also includes one full 12-point report, so you can judge the data fields and format before paying. The remaining 9,636 listings unlock only after checkout.

What the Free Sample Includes

The sample is not a static screenshot or a marketing mockup — it is described as 20 live rows pulled from the full database. For each row you can see:

• Name — the extension's original name
• Historical users — the install base it had before it died
• Category — e.g. Productivity, Shopping, Accessibility, Customization, Writing, New Tab
• Difficulty — rebuild effort rated Low, Medium, or High
• Died because — the cause of death, such as MV3 (Manifest V3 migration) or Abandoned
• Est. monthly — an estimated revenue range if rebuilt

A few rows from the sample, as shown on the site:

The Full 12-Point Report Example

The sample also opens one complete report — Session Stack (48,200 historical users, Productivity, Low difficulty, $500–$1,600/mo). This is the part that matters most for a buying decision, because it shows what a paid listing actually contains beyond the summary row.

According to the site, each listing gives you:

• Historical users
• Category
• Rebuild difficulty
• Why it died
• Who competes now
• A step-by-step rebuild plan

The full report is described as a 12-point report, so the sample report is the best way to confirm whether that depth matches what you need before committing.

What You Cannot See for Free

Only 20 of the 9,656 rows are open. The other 9,636 unlock at checkout. If your goal is to filter the whole database by category, difficulty, or revenue estimate, the free sample will not let you do that — you can only inspect the 20 rows and the one full report.

How to Use the Sample to Decide

1. Open the sample (no signup needed).
2. Scan the 20 rows and check whether the fields — historical users, difficulty, cause of death, revenue estimate — are the ones you would actually use to pick a project.
3. Open the full Session Stack report and read it end to end. Ask yourself whether the rebuild plan and competitor notes are specific enough to act on.
4. If the fields and report depth fit how you work, the paid tier gives you the same format across all 9,656 listings.

If you only need a handful of ideas, the sample alone may be enough to shortlist a direction. If you want to compare across categories or difficulty levels at scale, you will need the full database.

Pricing Context

The full database is listed at $29, with a 20% launch discount bringing it to $23.20 for the first 100 buyers. It is a one-time purchase with no subscription, includes a 30-day money-back guarantee, and comes as an instant Notion workspace plus CSV with lifetime quarterly updates. The site states it is used by 50+ indie makers. Confirm current price and terms on the site at purchase time, since the discount is limited to the first 100 buyers.

Each Chrome Goldmine listing is a 12-point report on one expired Chrome extension. Based on the site's sample, a report covers historical user count, category, rebuild difficulty, why the extension died, current competitors, a step-by-step rebuild plan, and an estimated monthly revenue range. The sample shows 20 of 9,656 rows openly; the remaining 9,636 unlock at checkout.

The core fields in every listing

The sample table on chromegoldmine.com displays these columns for each extension:

The "died because" field is the one that separates a rebuildable extension from a dead end. In the sample, causes split into two types: MV3 (the extension broke when Chrome moved to Manifest V3 and was never ported) and Abandoned (the developer simply stopped maintaining it). Both mean the demand existed and the product disappeared — but they imply different rebuild work.

What the full 12-point report adds

The sample page shows one complete report (Session Stack) beyond the table row. The site describes each listing as containing:

• Historical users — proof of demand, not a projection
• Category — where the extension competed
• Rebuild difficulty — Low, Medium, or High
• Why it died — MV3 migration failure or abandonment
• Who competes now — the current competitive landscape
• A step-by-step rebuild plan — the build path, not just an idea

The estimated monthly revenue range is tied to the listing, so you can compare opportunity size against rebuild difficulty before committing.

How to read the numbers before you buy

The sample gives enough rows to see the pattern:

• High users + Low difficulty (Session Stack, 48,200 users, Low) — the most attractive ratio, but also the most contested.
• High users + High difficulty (Grammar Lite, 36,700 users, High) — bigger revenue ceiling ($1,000–$3,000/mo) but more build work.
• Mid users + Medium difficulty (Coupon Clipper, 40,500 users, Medium) — $800–$2,400/mo, a middle path.

Difficulty and revenue range move together in the sample: Low-difficulty listings cluster at $300–$1,600/mo, High at $1,000–$3,000/mo. Treat the ranges as the site's estimates, not guarantees.

Access and pricing

• Sample: 20 live rows plus one full report, no signup required.
• Full access: $23.20 with a 20% launch discount for the first 100 buyers, then $29.
• Format: Instant Notion workspace + CSV, with lifetime quarterly updates.
• Refund: 30-day money-back, no questions.
• No subscription — one-time purchase.

The site states the database is used by 50+ indie makers and covers 9,656 expired extensions across 6 categories.

What the report does not include

The listing gives you research and a rebuild plan — it does not build the extension for you. The site's own framing is "Pick one. Rebuild it. Make Money." You still handle development, Chrome Web Store submission, and Manifest V3 compliance. The revenue ranges are estimates, and the historical user count reflects the extension's past installs, not users you automatically inherit.

Chrome Goldmine is a one-time purchase: $29 standard, or $23.20 for the first 100 buyers (20% off), with a 30-day no-questions money-back guarantee. You get an instant Notion workspace plus CSV, and lifetime quarterly updates. There is no subscription. If you're an indie maker looking for expired Chrome extensions to rebuild, the price is low enough that the main question isn't cost — it's whether the data matches how you plan to pick a project.

Pricing and What Triggers the Discount

The discount is capped at 100 buyers, after which the price returns to $29. If you're reading this after that window closes, assume $29. The $6 difference is small relative to the time you'd spend evaluating extensions, so don't let the deadline rush a decision you'd otherwise make carefully.

What You Actually Receive

Delivery is two formats plus ongoing updates:

• Instant Notion workspace — the browsable database of listings and reports.
• CSV — the same data in a form you can filter, sort, or import elsewhere.
• Lifetime quarterly updates — new expired extensions and refreshed data four times a year.

The CSV matters if you want to rank opportunities by your own criteria (for example, historical users divided by rebuild difficulty) rather than reading listings one at a time in Notion.

What's in Each Extension Report

Every listing covers an extension that people already installed before it died. According to the site, each report includes:

• Historical user count
• Category
• Rebuild difficulty
• Why it died
• Who competes now
• A step-by-step rebuild plan
• Estimated monthly revenue range

The sample rows show the shape of this. For example, Session Stack is listed with 48,200 historical users, Productivity category, Low difficulty, died from MV3, and an estimated $500–$1,600/month. Tab Suspender Reloaded shows 91,400 users, Medium difficulty, MV3, $600–$1,800/month. The full report expands to a 12-point format.

Preview Before You Buy

You can browse a sample without signing up: 20 live rows out of 9,656, plus one complete report. The remaining 9,636 rows unlock at checkout. Use the sample to check two things — whether the report depth matches what you need to scope a rebuild, and whether the categories (Productivity, Accessibility, Customization, Shopping, Writing, New Tab) overlap with what you can actually build.

Why "Expired" Counts as Proven Demand

The logic is that these extensions had real installs before they stopped working, so demand existed rather than being hypothetical. Many died for a specific, often fixable reason — the sample repeatedly cites MV3 (Manifest V3 migration) and abandonment. That's the pitch: you inherit a validated audience and a known failure cause instead of guessing at a market.

Treat the estimated monthly revenue as a range, not a promise. It's a projection attached to each listing, and your actual result depends on execution, competition, and how the extension is monetized.

A Reasonable Way to Decide

1. Open the free sample and read the full 12-point report for one extension.
2. Ask whether you could realistically ship that rebuild — check the difficulty rating against your skills.
3. If the report gives you enough to scope the work, the $23.20–$29 price is a small bet; the 30-day refund covers the case where it isn't.
4. If the sample feels thin or the categories don't fit what you build, skip it — the discount isn't a reason to buy data you won't use.

The purchase decision really comes down to whether one usable rebuild idea is worth roughly the price of a couple of coffees. The refund window means you can verify that after paying, not before.

An expired Chrome extension counts as "proven demand" because it already had real users who installed it — the market validated the idea before the extension died. Chrome Goldmine's database of 9,656 expired extensions leans on exactly this logic: each listing shows historical user counts, the category, why it died, rebuild difficulty, current competitors, and an estimated monthly revenue range. So instead of guessing whether anyone wants a tab manager or a coupon clipper, you start from a number that says people already did.

The core idea: installs are evidence

A brand-new extension idea is a hypothesis. An expired extension with 48,200 historical users is closer to a tested result. Those users chose to install it, which means the underlying job-to-be-done was real. The extension dying doesn't erase that demand — it just removes the supply.

That gap between "people wanted this" and "nobody is serving them now" is the opportunity the site is built around.

What each listing tells you

Chrome Goldmine structures every entry so you can judge feasibility without doing the market research yourself. From the sample rows, the fields are:

The "died because" field matters most. It separates two very different situations:

• MV3 — the extension broke when Chrome moved to Manifest V3. The demand is intact; the code just needs updating.
• Abandoned — the developer walked away. The demand is intact; the product just needs someone to maintain it.

Both are supply problems, not demand problems.

Why the death reason changes the play

If an extension died from an MV3 migration, the rebuild is largely technical: port the code, restore functionality, and you're competing against a known baseline. If it was abandoned, the work is more about re-engaging users and keeping the thing alive.

The sample shows both patterns across categories — MV3 deaths in Productivity, Shopping, and Writing, and abandoned ones in Accessibility, Customization, and New Tab. Difficulty ranges from Low (Dark Sites, Reading Mode) to High (Grammar Lite), which maps roughly to how much engineering the rebuild needs.

How to read the revenue estimates

The estimated monthly figures ($300–$900 at the low end, up to $1,000–$3,000 for Grammar Lite) are ranges, not guarantees. They're useful as a relative signal: a High-difficulty extension with a wide range is a bigger bet than a Low-difficulty one with a narrow range.

Use them to compare opportunities against each other, not as a forecast you can bank on.

What you actually get and what it costs

The full database is 9,656 extensions. Twenty rows are visible as a free sample without signup; the remaining 9,636 unlock at checkout. The listing price is $29, discounted to $23.20 for the first 100 buyers, with a 30-day money-back guarantee and lifetime quarterly updates. Delivery is an instant Notion workspace plus CSV. The site states there's no subscription.

Where this approach fits — and where it doesn't

This model works best if you can ship a Chrome extension and want a starting point with evidence behind it. It's less useful if you'd rather build something original, or if you can't act on a technical rebuild.

The honest caveat: historical users are a signal, not a promise. An extension that once had 91,400 users may have lost them for reasons beyond MV3 — a better competitor, a changed market, or a feature that no longer matters. The listing gives you the competitor picture and the death reason so you can check that before committing. Treat the user count as the start of your diligence, not the end of it.