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

firefox 115.12esr slow to startup

more options

Firefox 115.12esr slow to startup takes up to 10 second to load the first time now Firefox was fine in version 112.esr. to bad Firefox forces updates, even when the update make Firefox worse. https://snipboard.io/QF0ERT.jpg of course it works faster without extensions, that does not mean anything. I would reinstall the older version but Mozilla fixed so we cannot. I do not have time to reinstall all the extension so I am left with a useless Firefox. To bad Firefox does not allow reinstall of extension automatically, a reset of Firefox would also make Firefox useless; I am at a loss to how to continue to support Mozilla and not switch to another browser?

Firefox 115.12esr slow to startup takes up to 10 second to load the first time now Firefox was fine in version 112.esr. to bad Firefox forces updates, even when the update make Firefox worse. [https://snipboard.io/QF0ERT.jpg https://snipboard.io/QF0ERT.jpg] of course it works faster without extensions, that does not mean anything. I would reinstall the older version but Mozilla fixed so we cannot. I do not have time to reinstall all the extension so I am left with a useless Firefox. To bad Firefox does not allow reinstall of extension automatically, a reset of Firefox would also make Firefox useless; I am at a loss to how to continue to support Mozilla and not switch to another browser?

Valgt løsning

I file a bug, since this is not helping.

Open Bug 1904165 Opened 9 minutes ago Updated 1 minute ago

slow startup on first open Firefox ESR 115.12

Les dette svaret i sammenhengen 👍 1

All Replies (14)

more options

Startups times shouldn't be longer due to update. Perhaps cache is too big. Go to menu -> Settings -> Privacy & security -> Cookies & site data -> press the Clear data button.

Your screenshot shows that you're using uBlock Origin along with AdBlock+. Seriously: Do NOT use similar-purposed blocker(s) along with uBlock Origin: this will cripple uBO's ability to defuse anti-blocker mechanisms and its ability to minimize likelihood of site breakage. ("similar-purposed" = any other blocker making use of EasyList). uBlock Origin is enough.

Helpful?

more options

Actually, there are two of them:

0: {name: Adblock Plus - free ad blocker, type: extension, version: 4.2, isActive: TRUE, id: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}}
1: {name: AdBlocker Ultimate, type: extension, version: 3.8.25, isActive: TRUE, id: adblockultimate@adblockultimate.net}

You also have several password manager extensions and several download extensions.

Firefox 115 ESR only gets security updates that shouldn't have effect on startup speed.

Does this still happen if you disable the VPN?

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

  • switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window

Helpful?

more options

there is no vpn and the cache clear. I did not ask for comments on installed extensions, everything was fine until recent updates. Firefox 115 ESR only gets security updates that shouldn't have effect on startup speed; But In Fact it did change the startup speed. Firefox always load faster without extensions, I have tried disabling the extension one by one, I cannot blame the slow startup on extension since they have not changed in years only Firefox change with an update and slow speed.

Helpful?

more options

I see this extension in your System Details...

{name: Browsec VPN - Free VPN for Firefox, type: extension, version: 3.84.1, isActive: TRUE, id: browsec@browsec.com}

Helpful?

more options

To bad there is no objective way to test the Firefox first load time, as there is for webpages; suggestion often have nothing to do with the answers. once load after 10 second now all the other pages load timely; it is only the first load taking 10 seconds now.

Helpful?

more options

the vpn is not being used, so please stop taking about it. the problem is the Firefox startup time, with the extensions, without the extension there is no reason to use Firefox.

Helpful?

more options

You can try to uninstall (disable) the two ad-blocker extension I mention above and only leave UBO enabled as we have seen cases reported about Adblock Plus causing memory related issues.

Helpful?

more options

To bad there is no objective way to test the Firefox first load time, as there is for webpages; suggestion often have nothing to do with the answers. once load after 10 second now all the other pages load timely; it is only the first load taking 10 seconds now.

Helpful?

more options

I have already said I disable the extension with no changes in load time.

Helpful?

more options

https://firefox-source-docs.mozilla.org/performance/reporting_a_performance_problem.html https://profiler.firefox.com/docs/#/./guide-getting-started https://profiler.firefox.com/ I found a test but I could not get it to work, it say cannot find profile, and cannot load profile in 30 seconds etc.

Helpful?

more options

Can you post a similar screenshot with system info. see screenshot Did you already clear the startup cache? see screenshot

Helpful?

more options

Well that is the third time suggested to clear the cache, that does not make any difference. Firefox ESR has been work great until 115.12 and of course security updates can be an issue. Without any changes on my part Firefox went for starting up in one second to 12 seconds. It would seem the update slowed the loading of extension some how, but I am not removing them they have a use; unlike Firefox starting up in 12 second that is not useful anymore. It starts faster without the extensions, but so what, Firefox is not useful without the extension and Chrome has the same extension and no startup issues.

It is a problem if there is no object way to tell what the problem is.

Endret av alannsandiego

Helpful?

more options

This is a different cache that I didn't see mentioned before.

Helpful?

more options

Valgt løsning

I file a bug, since this is not helping.

Open Bug 1904165 Opened 9 minutes ago Updated 1 minute ago

slow startup on first open Firefox ESR 115.12

Helpful?

Still et spørsmål

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.