On which website do you see this error?
This usually means that the server only supports deprecated TLS 1.0 or TLS 1.1.
You can check the server.
*https://www.ssllabs.com/ss…
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/user…
Do you actually have this old version installed or do you only see it in Windows Programs since it is possible that the Windows Registry wasn't cleaned up properly when updating …
You can set media.videocontrols.picture-in-picture.video-toggle.enabled to false in about:config to disable the PiP icon on hover.
For the URL bar there is this separate pref:
…
Are you canceling the Primary Password prompt as that will lock the logins?
Are you using Sync?
*https://support.mozilla.org/en-US/kb/using-primary-password-sync
You can check that those pages aren't set as multiple homepages.
You can check the homepage setting in "Settings -> Home".
*https://support.mozilla.org/en-US/kb/how-to-set-th…
Are you possibly using "Clear history when Firefox closes" to clear the browsing history as this does disable session restore?
*https://support.mozilla.org/en-US/kb/restore-prev…
You can't recover a forgotten Primary Password, your only option might be having an earlier copy of key4.db from before you started using the PP or you are using Sync and have th…
Make sure you the latest Widevine version.
*Tools -> Add-ons -> Plugins
You can toggle DRM off/on to see if that makes Firefox (re)load DRM components.
*Settings -> General:…
Note that Firefox 130 is obsolete and no longer supported, current is 135.0.1.
*https://www.mozilla.org/firefox/notes/
If you can't update to a newer Firefox version then you…
The items on this page are ordered alphabetically, so you can easily find all related releases.
Since items overlap like the ESR releases where the next version is released at t…
If you connect Firefox to a specific Mozilla Account then you get the content stored on the Sync server for this account and you data get uploaded to this account.
So first conn…
You can place the mouse pointer between the location bar and the search bar in normal mode (i.e. not in customize mode) to get a resize pointer that you can drag left or right to…
I assume that you mean the Firefox Home page, see:
*https://support.mozilla.org/en-US/kb/how-to-set-the-home-page
----
*https://support.mozilla.org/en-US/kb/customize-items-on…
"You don't have permission to access..." errors are characteristic of a firewall that protects the server against misuse and this firewall thinks something is suspicious about th…
I notice that your Troubleshooting Information shows the ''Malwarebytes Browser Guard'' extension that has been reported to cause issues with CAPTCHAs.
*https://support.mozilla.…
What makes this difficult to you?
There are various ways to close a tab apart from clicking the close button or pressing Cmd+W on the currently selected tab.
You can right-clic…
See also:
*[https://bugzilla.mozilla.org/show_bug.cgi?id=1947987 1947987] - Encrypted Client Hello Fallback Mechanism study is required to view certain websites
OKay, it is about this pref:
network.dns.echconfig.fallback_to_origin_when_all_failed => true
----
Relevant raw data in about:support:
slug:encrypted-client-hello-fallba…
I did some testing and I think that this study is causing it:
Encrypted Client Hello - Fallback Mechanism
When I disable this study then I get the problem and DSC-Core.2024.03…
Yes, if you update the current 115 ESR version.
Firefox 115.13.0 and later have the new certificate.
*https://support.mozilla.org/en-US/kb/root-certificate-expiration
Are there any errors shown in the Browser Console as it could be possible that some error is throws an exception that causes CSS file not to get applied?
*https://firefox-source…
Easiest would be to use keyword bookmarks for such websites that you may visit frequently.
*https://support.mozilla.org/en-US/kb/how-search-from-address-bar
Firefox automatically creates an upgrade.jsonlz4- file in the sessionstore-backups folder.
Firefox may have created a new profile, so check this article.
*https://support.mozil…
Quote: ''the first thing that I did after resetting my Primary password was disable synchronisation and internet access...''
You should have disabled or disconnect Sync or res…
You can check the Web Console (Tools -> Web Developer) for messages about blocked content and about the presence of mixed or unsafe content.
*https://firefox-source-docs.mozilla…
This fallback-limit pref has been there for quite some time (Firefox 62), so this is not a recent change.
Some other change might be causing this problem if it started with a re…
Can you attach a screenshot?
*https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
*use a compressed image type like PNG or JPG to save the screenshot
--…
Try to rename the cert9.db file (cert9OLD.db) and remove a possible previously used cert8.db file in the Firefox profile folder with Firefox closed to remove intermediate certifi…
If you do not use the Primary Password then Firefox may show the dialog to enter some Windows credentials if you visit a page for which you have stored a login in case you have e…
I would assume that you only see this panel if you click the highlight tool.
Can you attach a screenshot?
*https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-…
A 400 "Bad Request" error issue is usually caused by corrupted cookies.
Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu bu…
If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock,NoScript,DuckDuckGo PE,Disconnect,Ghostery,uBlock Origin,Malwarebyte…
Seeing the "Your browser is being managed by your organization" notification at the top of the Settings page is usually caused by security software that uses GPO policy rules or …
You can check this support article.
*https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks
*https://support.mozilla.org/en-US/kb/bookmarks-firefox
If you use Sync, best is to disconnect Sync temporarily during troubleshooting.
You can check for problems with the places.sqlite and favicons.sqlite files in the Firefox prof…
You can try these steps in case of issues with webpages:
You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.
*hold down the Shift …
Clearing the cache is all or nothing, you can't clear the cache for a single origin (protocol and hostname).
*https://support.mozilla.org/en-US/kb/how-clear-firefox-cache
You…
You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.
*hold down the Shift key and left-click the Reload button
*press "Ctrl+F5" or pr…
You can try these steps in case of issues with webpages:
You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.
*hold down the Shift …
Do you still have the hard drive from the old device and is it still healthy enough to connect it via USB as in that case you might be able to retrieve relevant files from this h…
You can try these steps in case of issues with webpages:
You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.
*hold down the Shift …
This refresh block feature is not a security feature, but is an accessibility feature (as you can see by the name of the control pref) meant to prevent users that use a screen re…
See:
*https://support.mozilla.org/en-US/kb/password-manager-remember-delete-edit-logins
You may have to clear the cookies for this website via the padlock icon.
*https://sup…
What security software do you have?
It is likely your security software doing this and you either need to accept this or disable scanning in your security software or disable/…
You can look at these prefs in about:config.
browser.shopping.experience2023.active => false
browser.shopping.experience2023.enabled => false
If this pref is 1 then change i…
The storage/default folder also stores extension data (folders that start with moz-extension+++) that you likely would like to keep.
You can check the modified date and the fold…
Are you using code in userChrome.css that is possibly broken and needs an update?
*https://www.userchrome.org/what-is-userchrome-css.html
To test for issues, you can set this…
Seeing the "Your browser is being managed by your organization" notification at the top of the Settings page is usually caused by security software that uses GPO policy rules or …
I'm not sure why they are not available as the show as supported security prefs in the source code as added in Firefox 134.
Do you have the latest updates?
*https://searchfox.o…
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/user…
Are you using Sync as this is a possible reason to ask for the Primary Password when you start Firefox ?
Using Sync is a possible reason to ask for the Primary Password at sta…
Hi
See the link in my above reply on how to create a new profile.
*https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
You can find "Edit this question" under the sidebar "Question Tools" menu (you may have to scroll to the top).
For a reply, "Edit this post" is in the three-dot menu next to a r…
You can find "Edit this question" under the sidebar "Question Tools" menu (you may have to scroll to the top).
For a reply, "Edit this post" is in the three-dot menu next to a r…
Were you using Firefox before or are you using it for a longer time?
You can consider to create a new profile as it might not be easy to undo all imports.
See "Creating a pro…
Make sure you allow pages to choose their own fonts.
*Settings -> General -> Language and Appearance -> Fonts -> Advanced[X] "Allow pages to choose their own fonts, instead of y…
You can look at these articles.
*https://support.mozilla.org/en-US/kb/fix-video-audio-problems-firefox-windows
*https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-…
Websites can disable the Firefox spell checker via a spellcheck="false" attribute of an input field or textarea or editable element and possibly provide its own spelling checker.…
You can check the connection settings and check for possible issues with a Proxy or VPN service.
*Settings -> General -> Network: Connection -> Settings
If you do not need to…
Hi Mark Angus
Works fine here with Firefox.
You can check the Web Console (Tools -> Web Developer) for messages about blocked content and about the presence of mixed or unsaf…
You can enable the form autofill and credit card autofill feature by modifying some extensions.formautofill.*(supported|available) prefs in about:config, but no guarantee that th…
If you use Sync, best is to disconnect Sync temporarily during troubleshooting.
You can check for problems with the places.sqlite and favicons.sqlite files in the Firefox prof…
Did you try to close and restart Firefox or reboot the computer?
----
You can try these steps in case of issues with webpages:
You can reload webpage(s) and bypass the cache…
Your screenshot shows that the Firefox title bar is taking the full screen width, but the actual Firefox windows is taking a smaller part.
I don't know if this is normal on Mac …
You can check for issues with Enhanced Tracking Protection and Total Cookie Protection.
Firefox shows a purple shield instead of a gray shield at the left end of the location/ad…
If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock,NoScript,DuckDuckGo PE,Disconnect,Ghostery,uBlock Origin,Malwarebyte…
If clearing the "Restore Defaults Search Engines" on the "Settings -> Search" page doesn't work, try to rename/remove search.json.mozlz4 in the Firefox profile folder with Firefo…
What kind of links are you trying to open?
Do you open them in an external application and have Firefox set as the default browser or are those links on a webpage?
Can you attach a screenshot?
*https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
*use a compressed image type like PNG or JPG to save the screenshot
…
See also:
*https://support.mozilla.org/en-US/kb/recover-user-data-missing-after-firefox-update
*https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks
In modern browsers you need to use the VIDEO or AUDIO tag to make the built-in HTML media player play sounds, you can no longer use EMBED or OBJECT tags.
*https://developer.mozi…
Note that your screenshot and posted text lacks a closing curly bracket, you open two and close one.
Try this:
{
"policies": {
"DisableTelemetry": true
}
}
You can …
You can click the trashcan to remove the pref and recreate it as a Number pref.
You need to create a new Number pref named ui.prefersReducedMotion in about:config to show (0) …
You can right-click and select "Inspect" to open the built-in Inspector with this element selected.
*https://firefox-source-docs.mozilla.org/devtools-user/page_inspector/how_to/…
Aegis is an Android app.
There are Password Manager programs for Windows and Firefox extensions that you can use.
Some may be able to import a Google authenticator migrate list…
You can try these steps in case of issues with webpages:
You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.
*hold down the Shift …
If you reset the Primary Password then this means that there is no longer a PP active and you need to set a new PP.
*https://support.mozilla.org/en-US/kb/use-primary-password-pr…
See:
*https://support.mozilla.org/en-US/kb/customizing-firefox-using-group-policy
*https://mozilla.github.io/policy-templates/
-----
I can't move the thread to Firefox for En…
Can you attach a screenshot?
*https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem
*use a compressed image type like PNG or JPG to save the screenshot
…
