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Unable to signin to sync from "Sync preferences" page in browser

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  • 1 has this problem
  • Last reply by Gyrodrill

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Firefox Nightly 59.0a1 (2018-01-04) (64-bit), Windows 10 Education Insider 17046

When I click "Sign in to Sync", it is not signing into global service (my PC bought in China)

There is a button said "Switch to global service", but it doesn't work:

it restart the browser, nothing changes, when i open the sign in page, it is still

I can manually go to .cn page), but it got stuck when i try log in, with a red block "Working…"

If i open a new page and goto, it just goes correctly : but my browser is not Sync

Attached screenshots

Modified by Gyrodrill

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I've try to change some setting from about:config, reset everything that contains ""

It does change to global service, but still red block "Working.." when i log in via browser's sign in to sync page.

I've try F12 at that page, and following code comes: ``` WebChannel error: No Such Channel main.js:19807:10 Working… main.js:19804:10 Response not received for: fxaccounts:can_link_account main.js:19807:10 ```