Helps users quickly check how much they can sell items for (buyback prices) across multiple Japanese second-hand and electronics retailers before selling.

User installs extension -> Visits supported retail site (Amazon, Rakuten, etc.) -> Extension auto-detects product and adds comparison button -> User clicks button or uses popup to search -> Extension opens comparison page on hikaku-342505.firebaseapp.com showing buyback prices from multiple retailers

Target users: Japanese consumers looking to sell used items / Second-hand resellers and arbitrageurs / Price-conscious shoppers comparing real costs

The destination service (hikaku-342505.firebaseapp.com) is a Firebase app; its actual login/payment requirements cannot be fully verified without visiting the site. However, no auth code is present in the extension.
The 'purchase' feature redirects to /purchases/ on the destination service; it's unclear if this requires an account on the destination side, but the extension itself does not gate this feature.
Static analysis only covers the extension source; the destination service's UI and backend behavior are not directly observable.

Monetization

No paid features detected

The extension is free to use. The keyword 'purchase' found in the code refers to a '仕入れ' (sourcing/purchasing) feature that searches for buy prices on the destination service, not a paid subscription or billing feature. There are no references to Stripe, PayPal, credit cards, subscriptions, or upgrade prompts in the extension code.

Confidence: 90
Payment platform: --
Source: AI / High
Login required: No
Reason: The extension does not implement any login UI, nor does it send credentials or tokens to the destination service. The destination service (hikaku-342505.firebaseapp.com) is accessed via simple tab redirections without authentication headers or login flows visible in the source code. Users can perform searches and price comparisons without an account.

Permission risk

Medium-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：activeTab、scripting、storage

Publisher

sedo

Independent publisher

Email: [email protected]
Phone: --
Address: --

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Permissions

Host access

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30-day user trend

User Growth Over Time

30-day rating change

30-day rating change

Daily, weekly, and monthly growth

Version, languages, and crawl freshness

Product summary

Recent review snapshot

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