Diễn đàn hỗ trợ Firefox

My router address with extensions is xx.xx.xx.xx/#/login. My previous router was xx.xx.xx.xx/cgi-bin/MANGA/index.cgi. When I type the IP address without anything after it, the URL entry changes from the new address to the old one every couple of seconds. I can't log into the router because it keeps changing. I disabled URL autocomplete, but it doesn't change it. Whenever I enter the address, it still completes with first the correct and then the incorrect URL.

How do I stop this? Thanks in advance.

Hello, I have a problem, where many bookmarks from my old device are synchronized to my current Firefox browsers (on PCs) even when old device is removed months ago. What worse, when sync is performed, it duplicates tabs, now in "Bookmarks menu" I have albost 2000 bookmarks what are duplicates od ~20/30 ofer month. If Firefox do sync now on 2nd PC, I will get again 2000 and plus something bookmarks. Deleting it gives nothing. It comes back again and again. Normal Bookmarks tabalso gets old tabs and duplicates.