Mozilla halts Firefox 65 distribution on Windows Mozilla stopped the distribution of Firefox 65 for Windows through the organization's automatic update system after reports of antivirus incompatibilities emerged. For more info go here https://www.ghacks.net/2019/02/01/mozilla-halts-firefox-65-distribution-on-windows/
F 4 E:Have you had any certificate issues with the ESR versions, like some have with Firefox 65 ?
Hi F 4 E:
No, and according to Bugzilla's bug report #1523701 (SEC_ERROR_UNKNOWN_ISSUER Since Updating to Firefox 65) the FF v65 branch is the only branch affected. I assume that means that FF ESR v 52.9.0 users (XP and Vista) as well as the latest FF ESR v60.5.0 users (Win 7 and higher, released 29-Jan-2019) are not affected.
According to Lawrence Abrams' 01-Feb-2019 BleepingComputer article Mozilla Halts Firefox 65 Rollout Due to Insecure Certificate Errors these problems are being caused by the web protection modules in certain AVs (e.g., Avast, AVG, Kaspersky, ESET, Bitdefender) and Norton isn't on that list, so I'm also assuming that Norton users aren't affected. He has included instructions on how to temporarily disable HTTPS scanning in affected antivirus programs, and AVG has already released a bug fix.
A second option for affected Firefox v65 users is to enter their browser configuration settings (type about:config in the address bar) and change security.enterprise_roots.enabled to TRUE so that web sites can use the security certificate for the "problem" scan engines that are stored in the Windows certificate store (see quote below). That also suggests to me that any Win 8.1 or Win 10 machine using the built-in Windows Defender instead of a third-party AV should not encounter this problem.
"By default, Firefox 65 will use only use the certificates in their built in browser certificate store. It is possible, though, to enable the ability to also use the antivirus engine's certificate that are created in the Windows certificate store to validate other web sites certificates."
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32-bit Vista Home Premium SP2 * Firefox ESR v52.9.0 * Norton Security Deluxe v22.15.1.8
Have you had any certificate issues with the ESR versions, like some have with Firefox 65 ?
Hugh, you need to restart Firefox for it to upgrade, which I'm sure you know..
"Upgrade". Their term, not mine ! 
Well I hope we Norton users are OK since this one allowed FF to upgrade me when it told me it was available and all I had to do is Restart (they never say whether FF or Windows!).
I wasn't testing but actually using some time back due to issues with IE being so darned slow. The update scenario in general was a bit much for my tastes. I've never been one who has to have "the latest and greatest" until its been in the public use. By the time a trust level occurs, another build would come along and its right back to the races again. Some love FF and swear by it. Its not a bad browser, just different tastes on my part.
Cheers
SoulAsylum:Never have liked nor used FF. Mainly due to the all too frequent nightly build releases...
Hi SoulAsylum:
Do you mean you were testing with a Nightly edition of Firefox? There are different streams of Firefox builds during development of new releases - Nightly, Developer and Beta - where Nightly is the least stable and only intended for Mozilla software developers.
The stable edition of Firefox is only upgraded every 6 to 8 weeks or so, not including unscheduled incremental point updates that are sometimes needed to address high-risk security vulnerabilities or serious bugs found in new releases. There are currently only 7 upgrades scheduled for all of 2019 - see the release calendar at https://wiki.mozilla.org/Release_Management/Calendar.
Users who want even more long-term stability can install Firefox ESR (extended support release). The current FF ESR v60.0 for Win 7 and higher was released on 09-May-2018 and FF ESR v60.x users won't receive a major feature upgrade until they are automatically switched from FF ESR v60.x to FF ESR v68.x some time around August 2019. In the mean time ESR users will only receive incremental point updates (e.g., from ESR v60.1 to ESR v60.2) to patch security vulnerabilities every 6 to 8 weeks or so unless a zero-day exploit is identified that had to be patched immediately. The ESR FAQ notes that:
"Maintenance of each ESR, through point releases, is limited to high-risk/high-impact security vulnerabilities and in rare cases may also include off-schedule releases that address live security vulnerabilities. Backports of any functional enhancements and/or stability fixes are not in scope."
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32-bit Vista Home Premium SP2 * Firefox ESR v52.9.0 * Norton Security Deluxe v22.15.1.8
Never have liked nor used FF. Mainly due to the all too frequent nightly build releases. Just too much of a headache to keep track of with all the other issues computers present.
Cheers