PDF.js
This is a fork of PDF.js which works with SeaMonkey 2.49.x and Firefox 52 ESR. It may also work in Pale Moon.
Known issues:
- In SeaMonkey 2.53+, the PDF may fail to load until you press the Stop button in the browser.
For more information about pdf.js, see: https://github.com/mozilla/pdf.js
Getting the Code
To get a local copy of the current code, clone it using git:
$ git clone git://github.com/IsaacSchemm/pdf.js-seamonkey.git
$ cd pdf.js
Next, install Node.js via the official package or via nvm. You need to install the gulp package globally (see also gulp's getting started):
$ npm install -g gulp-cli
If everything worked out, install all dependencies for PDF.js:
$ npm install
Building PDF.js
To build the SeaMonkey extension, run:
$ gulp seamonkey
Installing
You can get the latest release of this fork from the releases page on GitHub or from addons.thunderbird.net.

