www.nicovideo.jp - design is broken

Browser / Version: Firefox 67.0b7 Operating System: Windows 10 Tested Another Browser: Yes

Problem type: Design is broken Description: Comment on the videos are displayed only for half. Steps to Reproduce: Any of video on niconico has this problem for my browser. Checked on Chrome and it works fine.

Browser Configuration

mixed active content blocked: false
image.mem.shared: true
buildID: 20190331141835
tracking content blocked: false
gfx.webrender.blob-images: true
hasTouchScreen: true
mixed passive content blocked: false
gfx.webrender.enabled: false
gfx.webrender.all: false
channel: aurora

Console Messages:

[u'[console.log([Nano] Nano Defender Activated :: www.nicovideo.jp) moz-extension://f076b5d5-8526-4872-84e1-bbb8e08e2bf2/content/core.js:12:13]', u'[JavaScript Warning: "onmozfullscreenchange " {file: "https://nicovideo.cdn.nimg.jp/web/scripts/pages/watch/watch_dll_ead97de107025cf6acf6.js" line: 135}]', u'[JavaScript Warning: "onmozfullscreenerror " {file: "https://nicovideo.cdn.nimg.jp/web/scripts/pages/watch/watch_dll_ead97de107025cf6acf6.js" line: 135}]', u'[JavaScript Warning: ": https://api.nicoad.nicovideo.jp/v1/contents/video/sm34891899/thanks?limit=4  (: CORS )"]', u'[console.error(URIError: The script(https://connect.facebook.net/ja_JP/sdk.js) is not accessible.) https://nicovideo.cdn.nimg.jp/web/scripts/pages/watch/watch_app_cb3069179cc17d6e3ffd.js:1:772910]', u'[JavaScript Warning: " Githubissues.
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webcompat / web-bugs

www.nicovideo.jp - design is broken #28847