Recently I found the text alignment for Latin and CJK Ideographs are different between Firefox and LibreOffice when I use vertical layout
Steps to Reproduce:
1. Open https://wymeditor.github.io/wymeditor/dist/examples/01-basic.html in Firefox, input 世界你好 Hello, World! in there and use writing-mode: vertical-rl property
2. Create Writer Document in LibreOffice, input the same text, then using LTR (vertical) direction for the page.
On Firefox the left edge of CJK Ideographs aligned with beard line (https://en.wikipedia.org/wiki/Descender), on LibreOffice, the left edge of CJK Ideographs aligned with baseline.
When vertical layout enabled, CJK texts should always align with beard line. See my attachment.
User Profile Reset: No
Build ID: 05d2a66955f8a6552a79696474386ca9f45f9ef2
CPU Threads: 4; OS Version: Windows 6.2; UI Render: default; Layout Engine: new;
TinderBox: Win-x86@62-merge-TDF, Branch:MASTER, Time: 2016-11-07_23:34:48
Locale: zh-CN (zh_CN); Calc: group
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:49.0) Gecko/20100101 Firefox/49.0
Created attachment 128651 [details]
screenshot from LibreOfficeDev
Created attachment 128652 [details]
Screenshot from Firefox
Created attachment 128653 [details]
You can also see the sample from here:
*** This bug has been marked as a duplicate of bug 103784 ***