Treestyletab: Firefox 69 b1 doesn't work chrome.css with snipet and visible horizontal tab

[array]

Short description

Steps to reproduce

1. Start Firefox with clean profile.(Profile test)
2. Install TST.
3. chorme.cssをスニペットのように設定し、水平タブがでないようにする

Expected result

水平タブがでないでTST.だけになる

Actual result

水平タブがでたままになる。
**
Chrome.cssの設定

Firefox Developer Editionの様子

**

Environment

• Platform (OS): Windows10 1903 64bit

• Version of Firefox:
  Firefox Developer Edition 69b1

• Version (or revision) of Tree Style Tab:
  3.1.2

[irvinm]

In about:config, do you have toolkit.legacyUserProfileCustomizations.stylesheets = true?

[array]

Thanks.
It's Working.

[piroor]

Then, is there nothing to do on TST side?

[irvinm]

@piroor this issue actually has nothing to do with TST. Firefox has added this new about:config value in 68 with the default as true if you already have userChrome.css or false otherwise. However, starting in 69 all "new installs" will have the value set to false. Therefore, anyone wanting to use userChrome.css on a clean install starting in 69 will need to toggle this about:config value to true before it will work. (So, not a bug of Firefox, but intended behavior)

https://www.ghacks.net/2019/05/24/firefox-69-userchrome-css-and-usercontent-css-disabled-by-default/

@array if you are fine, please close this item.