1. Verdict
Why a ladder instead of one target
This idea is assessed at six MRR levels instead of one fixed number. Paid browser extensions have skewed outcomes: most earn little, a few reach a comfortable figure, and the ones that do can vanish in a week when the host platform changes. A single "$20k MRR" number hides the most useful information: how likely each level is, and what each level costs in time.
The anchor: there is no verified base rate
- No verified base rate exists for paid Chrome extensions reaching a given MRR within 24 months. The Chrome Web Store shows user counts and ratings, not revenue. No survey of paid-extension outcomes was found.
- The 30 Sept 2026 catalog found that every common indie-SaaS success statistic failed verification ("54% earn $0", "15% reach $1K–$10K MRR").
- The consumer-app base rate used elsewhere in this portfolio (RevenueCat: 17.3% of new subscription apps reach $1k/month within 2 years, 4.6% reach $10k) covers mobile apps with app-store billing. It isn't comparable, so it isn't used.
What the odds are anchored on instead (see research/10):
- Merch Wizard + KDP Wizard (Rick Blyth, solo): $10k MRR combined when sold in April 2022, about 4 years after starting in June 2018. Sold at full asking price within 5 hours of listing. In 2019 Merch Wizard charged $9.99–14.99/month, so $10k MRR meant roughly 700–1,000 subscribers. His $12.99 one-time extension made $3k in total.
- Easy Folders (folders for ChatGPT and Claude): $3,700+ MRR and $42k total revenue 6 months after launch (Aug 2024). It was then threatened by ChatGPT's native Projects, and its listing now leads with "Projects". The total-revenue figure is high relative to MRR, which suggests one-off or lifetime sales were part of it (unverified).
- KDP-adjacent tools prove authors pay: Book Report charges $19–249/month by earnings tracked. Publisher Champ charges $16.99–29.99/month and claims 25,000 authors.
Three things push the odds up:
- A documented gap. KDP's help pages describe pricing edits one title at a time, with no bulk or scheduled option.
- A trigger event. The 70% ebook band widened to $12.99 on 7 July 2026, opt-in per title. Print royalties under $9.99 fell from 60% to 50% in June 2025 (one secondary source).
- Tiny costs. The product runs in the browser. Gross margin is ~90%, and there's no infrastructure to scale.
Three things push them down:
- Amazon controls everything: the page, the terms, the timing of native features. Its March 2026 Agent Policy already bans browser automation on Seller Central.
- Low price per customer (~$20 a month). $10k MRR needs ~500 paying publishers from a pool whose size is unverified.
- Episodic use. Repricing happens a few times a year. Without the promo scheduler becoming a monthly habit, month-3 retention falls.
Odds at each MRR level (reached by month 24)
| MRR at month 24 | Base rate | As described (any seller dashboard) | Amazon Merch only | Etsy bulk-edit extension | Meesho / Flipkart panels | Seller Central extension | Recommended, ~15 hrs/week | Recommended, full-time |
|---|---|---|---|---|---|---|---|---|
| $1k | No verified base rate | 30% | 28% | 25% | 30% | 15% | 40% | 55% |
| $3k | No verified base rate | 14% | 12% | 11% | 10% | 7% | 22% | 33% |
| $5k | No verified base rate | 8% | 7% | 6% | 5% | 4% | 14% | 22% |
| $10k | No verified base rate | 3% | 3% | 2% | 2% | 2% | 6% | 11% |
| $20k | No verified base rate | 1% | 1% | 1% | <1% | 1% | 2% | 4% |
| $50k | No verified base rate | <0.5% | <0.5% | <0.5% | <0.5% | <0.5% | <1% | 1% |
The alternative columns assume full-time effort. At ~15 hrs/week, multiply them by about 0.7.
Recommended means a Chrome extension for KDP publishers with 20+ titles that does bulk price and royalty edits, timed promos and backlist checks, as set out in WHAT-TO-DO-AND-AVOID.md, with the 3 conditions met:
- you can build and maintain an MV3 extension yourself;
- you can reach 20 publishers with 20+ titles before building;
- you fix breakages within 24 hours for 24 months.
If any one condition is missing, multiply the recommended odds by about 0.65.
These are judgment estimates anchored to the data points above, not computed statistics.
Notes on the alternatives:
- As described can't be sold until a platform is picked. The odds equal the average of the options below, with a penalty for the months spent choosing.
- Amazon Merch only is the Merch Wizard market, but in 2026 it holds at least 8 live extensions, including free ones (Productor, MerchSpark). The newest sell upload automation and "safety" from detection, which says where the category has gone.
- Etsy bulk edit is already sold through Etsy's official API (Vela from $10/shop/month for 250 listings, Evlista, Sale Samurai). Etsy's API terms bar browser extensions from accessing or scraping Etsy without written permission. The right Etsy product is a web app on the API, not an extension, and that market is taken.
- Meesho and Flipkart have real pain (returns, RTO, lost-order claims), but extensions already sell at ₹29/month with manual renewal. You'd need thousands of paying sellers for $3k MRR. Terms of service were not checked.
- Seller Central has the highest price per customer, but Amazon's Agent Policy (4 Mar 2026) allows automation only through the SP-API. A browser extension that edits Seller Central is on the wrong side of the line, and a customer's account is what pays the penalty.
How to read the ladder
- $1k–3k is a realistic outcome. It takes 50–150 publishers. The July 2026 royalty change and author communities can deliver that.
- $5k–10k needs a monthly job. Timed promos and a monthly health report have to hold customers between repricing events. A second store probably has to be added.
- $20k and above needs ~1,000 paying publishers. That's about the size of Merch Wizard's peak in a bigger market, from a pool nobody has counted.
- The odds fall fastest between $3k and $10k. That's where a single-platform extension usually runs out of buyers, or runs into the platform.
Portfolio definitions (for comparison with other ideas)
| Tier | Definition | Recommended, ~15 hrs/week | Recommended, full-time | As described |
|---|---|---|---|---|
| Tier A (venture) | $1M ARR within 36 months, ≥70% gross margin, ≥50% month-12 logo retention | <0.5% | <0.5% | <0.5% |
| Tier B (profitable business) | $20k+ MRR within 24 months, profitable, ≥80% gross margin, ≥70% month-3 retention | ~1.5% | ~3% | ~1% |
Tier B sits just below the $20k rung. Margin isn't the issue (it's ~90%). Month-3 retention is: some authors reprice once and cancel.
How this compares with the other ideas in this portfolio: lower than StatusLens, TradeLedger and DocPress at every rung, because the price per customer is a quarter of theirs and the platform can end the product. Close to WaiverWorks and StoreComply at $1k–3k. Its advantages are unusual: the smallest build, near-zero running cost, and a named solo case that sold in 5 hours.
Fundable in current form?
No. A browser extension inside one Amazon dashboard is a small, sellable asset, not a venture. See 06-fundability.md. It doesn't need funding: the build is weeks, not months, and running costs are near zero.
One-paragraph verdict
The pattern is proven: find a dashboard the platform neglects, fix one tedious job inside it, and charge a subscription. Merch Wizard did it to $10k MRR and a fast sale. But "any seller dashboard" isn't a product. In 2026 the obvious targets are closed. Seller Central now bans browser automation, Merch is saturated with upload bots, Etsy's terms bar extensions and its bulk edit is sold through the API, and Indian seller panels pay ₹29 a month. KDP is the exception: its Bookshelf still makes publishers change prices one title at a time, and the July 2026 royalty change gave every prolific author a reason to act. Build the backlist pricing and promo tool, stay strictly user-driven, fix breakages within a day, and $1k–3k MRR is a reasonable expectation, $5k is possible, and $10k is a stretch. Treat it as a small, profitable, sellable asset, with a kill switch if Amazon ships the feature.