+++ This bug was initially created as a clone of Bug #1364136 +++ Changes since last update: #8398 Convert the `DOMCMapReaderFactory` and `DOMCanvasFactory` to ES6 classes #8258 Enable running a subset of the API unit-tests on Travis #8406 Gracefully ignore transaction failure in plugin-babel-cached #8411 Replace unnecessary `var self = this` statements with arrow functions in `web/pdf_page_view.js` and `web/pdf_thumbnail_view.js` #8417 Use eslint-plugin-mozilla and the webextensions environment to avoid defining globals in each file. #8413 Adds additional parameter so background color of canvas can be set #8388 Cache JPEG images, just as we do for other image formats, in `evaluator.js` (issue 8380) #8420 Revert "Upstream changes from: Bug 1319111 - Expose result principal URL ("final channel URL") on LoadInfo, convert current consumers of LOAD_REPLACE"

Pushed by ryanvm@gmail.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/60c8cc9c57d3 Update pdf.js to version 1.8.363. r=bdahl