Firefox Community Forum

I have signed up to a website that requires login stored in one or more small cookies and also stores a large amount of data locally to carry out processing. My Firefox desktop 153.3 ESR is set to delete all site data on exiting unless listed as an exception, which is what I want for most sites for privacy and security. For most of the exceptions that are not deleted, keeping local site data as well as cookies is not an issue and it is essential to keep local data for some. However, for this one site, I want to KEEP its cookies so I remain logged in but DELETE the site data automatically on exiting Firefox. I cannot see any setting for individual websites to handle cookies and local data differently, while changing the overall option for what is cleared would also delete the local data for other sites that is essential to keep.

Is there any way of configuring Firefox to delete a website's local data on exit while retaining its cookies without deleting otherexception websites' local data? If not, providing granular control of what is kept and deleted for website exceptions to the general clear on close would be a very useful feature to add. Thank you.

I get the window shown in the attached image when I launch Firefox now that I have updated from the ESR 140 versions to the ESR 153 versions.

If I click OK, it takes me into Firefox but it appears that the settings in my auto config are not being set suggesting that the configuration file that cannot be read is the firefox.cfg file that the instructions for auto configure (https://mzl.la/3pb4w0I) tell one to create with all the settings. It appears that the autoconfig.js file that is in "C:\Program Files\Mozilla Firefox\defaults\pref" is being read correctly as the two settings show properly in about:config.

I have set the specs on autoconfig.js to have be:

• end of line as LF and not the Windows/DOS standard of CRLF,
• the text encoded in UTF-8, and
• I have tried with BOM and non-BOM.

I have also tried these specs on the firefox.cfg file even though the the auto configure instructions do not say what specs to use on that file.

As I mentioned, things worked fine while I was using Firefox ESR 140.x, where x could be completion of any of the valid version numbers. Now that I have upgraded to Firefox ESR 153.x, this problem seems to have surfaced.

From the auto configure instructions, firefox.cfg is to be placed in "C:\Program Files\Mozilla Firefox", however, in doing a web search, I came across and article on LinkedIn (https://www.linkedin.com/pulse/2023fix-firefox-failed-read-configuration-file-error-andrew-m) from about three years ago that indicates firefox.cfg is to be in the same directory as autoconfig.js. Given it worked as described in the auto configure instructions before ESR 153, I figured this was wrong but tested it anyway by moving the firefox.cfg file. It changed nothing.

This is a problem for all my users on each of their individual domain accounts. I have tested and it makes no difference whether I'm running it on a Win10 or a Win11 computer.

I am using auto config for those settings that cannot be changed through Group Policy.