[Firefox] Use getTabForBrowser instead of _getTabForBrowser if possible
Bug 1071709 - 5-30% TART / Session Restore regressions on Inbound (v.35) september 22 from rev d3a7f765152f
Fix "Automatic Zoom" for landscape documents with very wide pages (issue 5398)
Merge pull request #5399 from Snuffleupagus/issue-5398

Fix "Automatic Zoom" for landscape documents with very wide pages (issue 5398)
Merge pull request #5396 from Snuffleupagus/bug-1071709

Bug 1071709 - 5-30% TART / Session Restore regressions on Inbound (v.35) september 22 from rev d3a7f765152f
Merge pull request #5395 from Snuffleupagus/getTabForBrowser

[Firefox] Use getTabForBrowser instead of _getTabForBrowser if possible
Refactors PdfDataLister buffering.
Merge pull request #5402 from yurydelendik/streammem

Refactors PdfDataLister buffering.