To edit PDF locally on Chrome, embedded PDFTron PDF editor library to a Chrome extension. Clicking the extension icon just opens a new tab, where is a PDFTron editor page, user select a local PDF file, and save locally after edit.
The extension is intended to distribute as free usage, it's non-commercial use, and have no PDF sharing features that might be used for Ads and promotion.
The library used in this extension is @pdftron/webviewer NPM module. I've found that it's not a completely free package, and not sure about whether I can use it in my public extension.
So I'd like to know:
1. Can I use the @pdftron/webviewer NPM module for free for creating a free Chrome extension to be published?
2. If not, how much it will cost to purchase a license for it?
3. What kind of license should I apply to my Chrome extension? Should I mention about your @pdftron/webviewer NPM module license and license my extension as MIT or Apache license?
Or should I use a special license you enforce to me?
Please answer to my 3 questions. If it's not too much expensive, I'm going to purchase it, because PDFTron PDF editor is so nice tool.
Kind regards,
Hotte