In latest Nightly builds, swiping from one section in a New Tab to another is reversed. STR: 1. Install RTL Nightly build of Firefox for Android 2. Open a New Tab 3. Swipe RIGHT to go to Bookmarks -> nothing happens 4. Swipe LEFT (nothing should happen) -> Firefox goes to Bookmarks In short, swiping right should go left, and swiping left should go right. Same as in LTR builds.

I am able to reproduce this. Max, is this something the framework permits?

(In reply to Ioana Chiorean from comment #1) > I am able to reproduce this. > Max, is this something the framework permits? The root cause of this bug is that we use ViewPager from google supoprt library that does not support RTL. Better solution could be replacing it with RecyclerView and some scrolling tweak. Unfortunately, we probable have not enough time to fix it before 53 merge.

Max any updates here?

(In reply to Ioana Chiorean from comment #3) > Max any updates here? I found a solution for this bug. But I need to check with Sebastian to confirm our external open source library policy. The patch should be low risk for uplift. I'll try to land the patch before next week;

Comment on attachment 8849458 [details] Bug 1321981 - [RTL] ViewPager Support - part 1. Import thirdparty RtlViewPager, https://reviewboard.mozilla.org/r/122236/#review124380

Comment on attachment 8849459 [details] Bug 1321981 - [RTL] ViewPager Support - part 2. Notify dataset change with calling super, https://reviewboard.mozilla.org/r/122238/#review124382

Comment on attachment 8849460 [details] Bug 1321981 - [RTL] ViewPager Support - part 3. Skip set current item if adapter is empty, https://reviewboard.mozilla.org/r/122240/#review124384

Comment on attachment 8849461 [details] Bug 1321981 - [RTL] ViewPager Support - part 4. Switch to RtlViewPager, https://reviewboard.mozilla.org/r/122242/#review124386

Pushed by max@mxli.us: https://hg.mozilla.org/integration/autoland/rev/094d01c3c450 [RTL] ViewPager Support - part 1. Import thirdparty RtlViewPager, r=sebastian https://hg.mozilla.org/integration/autoland/rev/e0c93b49a773 [RTL] ViewPager Support - part 2. Notify dataset change with calling super, r=sebastian https://hg.mozilla.org/integration/autoland/rev/b03a53a62cfe [RTL] ViewPager Support - part 3. Skip set current item if adapter is empty, r=sebastian https://hg.mozilla.org/integration/autoland/rev/2ed5a83f2ae2 [RTL] ViewPager Support - part 4. Switch to RtlViewPager, r=sebastian

https://hg.mozilla.org/mozilla-central/rev/094d01c3c450 https://hg.mozilla.org/mozilla-central/rev/e0c93b49a773 https://hg.mozilla.org/mozilla-central/rev/b03a53a62cfe https://hg.mozilla.org/mozilla-central/rev/2ed5a83f2ae2

This seems to work very well in latest Nightly. Can someone with a tablet also confirm?