[CSP] removes inlined styles and scripts
[CSP] remove HTTP CSP Headers
Faster JBIG2 decoding for Firefox
Merge pull request #3542 from fkaelberer/FasterJBIG2decode

Faster JBIG2 decoding for Firefox
Merge pull request #3523 from yurydelendik/csp

Bug 889320 - [CSP] removes inlined styles and scripts, also HTTP headers
Move ThumbnailView from viewer.js to its own file