Actually re-generate pdf.js and switch to the new API.
Revert "Fix the gradients."

This reverts commit 956ffc52203d539dc8600ce846db8d6725fcf029.
Revert "More -moz- removal."

This reverts commit 8274ffa60d09a18b7f33028723cbea82f3aed097.
Revert "-moz-linear-gradient → linear-gradient"

This reverts commit c857be742cb60e3266edb1674b0ed0d516aa0c2c.
Revert "nsIPrefBranch2 → nsIPrefBranch"

This reverts commit 857476cae6dd81b921857d329d222d273c116fbe.
Locale update.
v2.6.2
Really fix locales.