Users want to download Bilibili videos for offline viewing, but Bilibili does not natively offer a download button. The extension intercepts Bilibili's video CDN streams and sets Content-Disposition headers to 'attachment', triggering file downloads.

1. User installs extension and navigates to a Bilibili video/bangumi page. 2. Content script (video_bilibili_accessible.js) reads video metadata from the page's __INITIAL_STATE__ or __playinfo__. 3. Content script (video_bilibili_content.js) displays download options injected into the page UI. 4. When user clicks download, the popup/background resolves video URLs via Bilibili's player API. 5. declarativeNetRequest rules rewrite the Referer header and set Content-Disposition:attachment on bilivideo CDN requests, forcing the browser to download the video file instead of streaming it. 6. Optionally, the user can convert the downloaded video format via cv.pictureknow.com.

Target users: Chinese internet users who watch videos on Bilibili and want to download them for offline use / Users browsing Chinese e-commerce platforms (Taobao, Tmall, JD) looking for coupons

All JS files are minified/webpack-bundled, making it difficult to trace exact application logic beyond keyword scanning
The coupon_content.js and jd_coupon_content.js files are large React bundles whose specific UI elements cannot be easily inspected
Cannot confirm whether the popup UI shows any paywall or upgrade prompts without rendering it

Monetization

No paid features detected

No evidence of paid features, subscription gating, upgrade prompts, or payment platform integration found in the extension source code. Keyword matches for 'pro', 'license', and 'pay' were all false positives from React production builds, MIT license headers, CSS progress elements, and Sizzle.js internals. No Stripe, premium, membership, VIP, subscription, or upgrade keywords were found. The extension appears to be entirely free.

Confidence: 90
Payment platform: --
Source: AI / Medium
Login required: No
Reason: The extension itself does not implement any login UI, authentication flow, or account system. It works by extracting video metadata directly from Bilibili's page state (window.__INITIAL_STATE__, window.__playinfo__) via a content script injected into bilibili.com video/bangumi pages, and calls api.bilibili.com/x/player/playurl for video URLs. No cookie manipulation, OAuth, password fields, or sign-in UI were found. However, Bilibili (the destination service) may require its own login for higher-quality streams or bangumi content, which is outside the extension's control.

Permission risk

High-risk permissions

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

敏感权限：proxy、management
扩展能力较强：tabs、storage
主机权限覆盖范围较宽

Publisher

tomxuxu

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