amp-lightbox: Better resource scheduling for scrollable lightbox (amp…

…project#12751)

visibity-model-bug-fix (ampproject#12752)

Don't rewrite values of binding attributes in sanitizer.js (ampprojec…

…t#12688)

* fix incorrect rewriting of [href] attr vals in sanitizer

* lint

fix (ampproject#12657)

Fix font visual test (ampproject#12543)

amp-sidebar: reverting effect of ampproject#12502 for now since it ov…

…errides effects of local navigation (ampproject#12561)

Fix font visual test (ampproject#12543)

Deactivate font stylesheet timeout in Safari. (ampproject#12521)

Due to https://bugs.webkit.org/show_bug.cgi?id=180940

Mitigates ampproject#12520

Deactivate font stylesheet timeout in Safari. (ampproject#12521)

Due to https://bugs.webkit.org/show_bug.cgi?id=180940

Mitigates ampproject#12520

Unbreak extensions with versions≠0.1 in ShadowDOM (ampproject#12430)

* Unbreak extensions with versions≠0.1 in ShadowDOM

* Fix tests

* Add new test for opt_extensionVersion parameter

* Add runtime test