Refactors showText: split type3, remove showSpacedText
Prevent font error when no preferred cmap table is found (workaround for issue 4800)
Update web/compatibility.js

1) Remove obsolete workarounds
2) Add support comments
Fixes unhandled XObject subtype PS error
Merge pull request #4832 from yurydelendik/showtext

Refactors showText: split type3, remove showSpacedText
Merge pull request #4861 from timvandermeij/xobject

Fixes unhandled XObject subtype PS error
Adds compatibility.js to the Firefox extension
Merge pull request #4803 from mzgol/compatibility

[WIP] Update web/compatibility.js
Merge pull request #4865 from yurydelendik/issue4854

Adds compatibility.js to the Firefox extension
Reverts mozRequestAnimationFrame to compatibility.js
Added more preference variables from the available hash parameters
Removes mozResponseArrayBuffer
Disables worker if XHR does not support arraybuffer
Prevent adding undefined array entries to CMap.map in mapRangeToArray (issue 4875)
PdfRedirector checks if plugin is still in PlayPreview mode
Merge pull request #4877 from yurydelendik/redircheck

PdfRedirector checks if plugin is still in PlayPreview mode
Version 1.0.277
Merge pull request #4879 from yurydelendik/master

Version 1.0.277
Merge pull request #4851 from orionhealth/4792-addprefhashparam

Added more preferences for the available hash parameters.
Merge pull request #4866 from yurydelendik/issue4673

Removes mozResponseArrayBuffer