This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Le thread ibilondoloziwe. Nceda ubuze umbuzo omtsha ukuba ufuna uncedo.

Unable to cannect with ASUS router after upgrade to Firefox 77.0.1

  • 2 iimpendulo
  • 1 inayo le ngxaki
  • 1 view
  • Impendulo yokugqibela ngu investr.dave

investr.dave
investr.dave
more options

After upgrading from Firefox 76.0.1 to 77.0.1 on Windows 10, I am unable to connect with my Asus RT-AC68U router via the browser interface. When I attempt to login to the router, I get an error message "Invalid username or password". If I use Chrome version 83.0.4103.97, I am able to access the router without issue. I have tried Firefox in Safe Mode, but I still get the same error message. I have also tried resetting Firefox without any success.

I have another computer running Windows 10 with Firefox 76.0.1, so I confirmed that I could access the router with that version of Firefox and it worked fine. I updated Firefox on that machine to version 77.0.1 using the update button under Help/About and then tried connecting with the router again - it fails with the "Invalid username or password" error message. Again, I am able to connect using either Chrome or Edge browsers, but not with the latest version of Firefox.

After upgrading from Firefox 76.0.1 to 77.0.1 on Windows 10, I am unable to connect with my Asus RT-AC68U router via the browser interface. When I attempt to login to the router, I get an error message "Invalid username or password". If I use Chrome version 83.0.4103.97, I am able to access the router without issue. I have tried Firefox in Safe Mode, but I still get the same error message. I have also tried resetting Firefox without any success. I have another computer running Windows 10 with Firefox 76.0.1, so I confirmed that I could access the router with that version of Firefox and it worked fine. I updated Firefox on that machine to version 77.0.1 using the update button under Help/About and then tried connecting with the router again - it fails with the "Invalid username or password" error message. Again, I am able to connect using either Chrome or Edge browsers, but not with the latest version of Firefox.

Isisombulu esikhethiweyo

The router is already running the latest firmware (version 3.0.0.4.385_20490-g57b06ea).

I found the problem to be that the password pasted from my password manager is 17 characters where the router password is limited to 16 characters. I noticed the issue by checking the "Show password" box when Firefox asks if I want it to save the password - the password shown was missing the last character. If I manually typed the password, the router would allow me to login. This problem manifested in Firefox 77 due to a new feature to truncate pasted text. Setting the Firefox parameter editor.truncate_user_pastes to TRUE fixes my issue (using a 16-character password on the router would also resolve the problem). The default value for editor.truncate_user_pastes is FALSE.

Additional info can be found here: https://www.ghacks.net/2020/05/18/firefox-77-wont-truncate-text-exceeding-max-length-to-address-password-pasting-issues/

Thanks.

Funda le mpendulo kwimeko leyo 👍 0

All Replies (2)

Pallavi kumari
Pallavi kumari
more options

https://www.asus.com/lk/support/FAQ/1005484/

investr.dave
investr.dave Umnini wombuzo
more options

Isisombululo esiKhethiweyo

The router is already running the latest firmware (version 3.0.0.4.385_20490-g57b06ea).

I found the problem to be that the password pasted from my password manager is 17 characters where the router password is limited to 16 characters. I noticed the issue by checking the "Show password" box when Firefox asks if I want it to save the password - the password shown was missing the last character. If I manually typed the password, the router would allow me to login. This problem manifested in Firefox 77 due to a new feature to truncate pasted text. Setting the Firefox parameter editor.truncate_user_pastes to TRUE fixes my issue (using a 16-character password on the router would also resolve the problem). The default value for editor.truncate_user_pastes is FALSE.

Additional info can be found here: https://www.ghacks.net/2020/05/18/firefox-77-wont-truncate-text-exceeding-max-length-to-address-password-pasting-issues/

Thanks.