Synced tabs failed on two devices while others working

[yifan]

I login into two pc devices, and I can send tab links from one to the other. However, I cannot use synced tabs. It only shows the result of the tabs from my phone. The history can be syncronized but with some delay (I have to restart firefox to see the synced history). I have set the tabs as synced items. Hope someone can help.

[yifan · Accepted solution]

After logout and signin multiple times I finally succeed. The sync speed is not so good but acceptable.