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Unexpected response from server

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Greetings All, Have Googled this to no avail. Win 7 Home Premium SP1. When trying to access any site on FF (Ver. 62.0.3) getting error


Unexpected response from server

Firefox doesn’t know how to communicate with the server.

   Check to make sure your system has the Personal Security Manager installed.
   This might be due to a non-standard configuration on the server.


Internet explorer working fine on this computer. Have tried "Refresh Firefox" and "Restart with add-ons disabled" In their troubleshooting wizard. I Have to avoid un-install - re-install as I am trying to help an elderly neighbor and she does not have ANY ! of her passwords written down. Any thoughts suggestions greatly appreciated. Cheers !

Greetings All, Have Googled this to no avail. Win 7 Home Premium SP1. When trying to access any site on FF (Ver. 62.0.3) getting error Unexpected response from server Firefox doesn’t know how to communicate with the server. Check to make sure your system has the Personal Security Manager installed. This might be due to a non-standard configuration on the server. Internet explorer working fine on this computer. Have tried "Refresh Firefox" and "Restart with add-ons disabled" In their troubleshooting wizard. I Have to avoid un-install - re-install as I am trying to help an elderly neighbor and she does not have ANY ! of her passwords written down. Any thoughts suggestions greatly appreciated. Cheers !

Chosen solution

I would suggest to backup personal data that is stored in the profile folder. For the passwords you need the logins.json and key4.db files.

You can backup specific files in the current profile folder with Firefox closed to have a backup

  • bookmarks and history: places.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Data
  • logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager
    if you only have key3.db then make sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
    if you only have cert8.db then make sure to remove an existing cert9.db
  • persdict.dat for words you added to the spelling checker dictionary
  • permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)
Read this answer in context 1

Additional System Details

Installed Plug-ins

  • Shockwave Flash 31.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0

More Information

jscher2000
  • Top 10 Contributor
8580 solutions 70167 answers

Helpful Reply

Hi Bytor2112, I think it may be necessary to do a reinstall, but nondestructively:

(1) Back up the profile folder "just in case"

Back up and restore information in Firefox profiles

Note: After a refresh, the older settings folder could be found on the Windows desktop inside an Old Firefox Data folder, so that might be enough of a backup.

(2) Use this procedure:

Clean Reinstall

This takes about 5 minutes. It's not about your settings, it's about making sure the program files are clean (no inconsistent or alien code files). As described below, this process does not disturb your existing settings. It's not essential to uninstall Firefox, but you can if you like, saying No to any request about removing personal data.

It only takes a few minutes.

(A) Download a fresh installer for Firefox to a convenient location:

https://www.mozilla.org/firefox/all/

(B) Exit out of Firefox (if applicable).

If you use Microsoft Office, please change your default browser to Internet Explorer temporarily before the next step.

(C) Using Windows Explorer/My Computer (hold down the Windows key and press E to launch it), right-click > rename the program folder as follows (you might have one or both):

C:\Program Files (x86)\Mozilla Firefox =to=> C:\Program Files (x86)\OldFirefox

C:\Program Files\Mozilla Firefox =to=> C:\Program Files\OldFirefox

(D) Run the installer you downloaded in step (A). It should automatically connect to your existing settings.

Any improvement?

Hi Bytor2112, I think it may be necessary to do a reinstall, but nondestructively: (1) Back up the profile folder "just in case" [[Back up and restore information in Firefox profiles]] ''Note: After a refresh, the older settings folder could be found on the Windows desktop inside an Old Firefox Data folder, so that might be enough of a backup.'' (2) Use this procedure: '''Clean Reinstall''' This takes about 5 minutes. It's not about your settings, it's about making sure the program files are clean (no inconsistent or alien code files). As described below, this process does not disturb your existing settings. It's not essential to uninstall Firefox, but you can if you like, saying No to any request about removing personal data. It only takes a few minutes. (A) Download a fresh installer for Firefox to a convenient location: https://www.mozilla.org/firefox/all/ (B) Exit out of Firefox (if applicable). ''If you use '''Microsoft Office''', please change your default browser to Internet Explorer temporarily before the next step.'' (C) Using Windows Explorer/My Computer (hold down the Windows key and press E to launch it), right-click > rename the program folder as follows (you might have one or both): C:\Program Files (x86)\Mozilla Firefox =to=> C:\Program Files (x86)\OldFirefox C:\Program Files\Mozilla Firefox =to=> C:\Program Files\OldFirefox (D) Run the installer you downloaded in step (A). It should automatically connect to your existing settings. Any improvement?
cor-el
  • Top 10 Contributor
  • Moderator
17346 solutions 156791 answers

Chosen Solution

I would suggest to backup personal data that is stored in the profile folder. For the passwords you need the logins.json and key4.db files.

You can backup specific files in the current profile folder with Firefox closed to have a backup

  • bookmarks and history: places.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Data
  • logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager
    if you only have key3.db then make sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
    if you only have cert8.db then make sure to remove an existing cert9.db
  • persdict.dat for words you added to the spelling checker dictionary
  • permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)
I would suggest to backup personal data that is stored in the profile folder. For the passwords you need the logins.json and key4.db files. *https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them You can backup specific files in the current profile folder with Firefox closed to have a backup *bookmarks and history: places.sqlite *bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder *cookies.sqlite for the Cookies *formhistory.sqlite for saved autocomplete Form Data *logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager<br>if you only have key3.db then make sure to remove an existing key4.db *cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager<br>if you only have cert8.db then make sure to remove an existing cert9.db *persdict.dat for words you added to the spelling checker dictionary *permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences) *sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)
cor-el
  • Top 10 Contributor
  • Moderator
17346 solutions 156791 answers
Maybe also do a malware scan just to be sure. *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware

Question owner

Thank you scher2000 ans cor-el ! Successfully backed up bookmarks, passwords etc. and did a re-install - All Good ! Amazingly Awesome support from this site. Is there a way to send a thank you or Kudos to you ? Thanks again for your help.

Thank you scher2000 ans cor-el ! Successfully backed up bookmarks, passwords etc. and did a re-install - All Good ! Amazingly Awesome support from this site. Is there a way to send a thank you or Kudos to you ? Thanks again for your help.