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This article provides information about the changes in Firefox 67 that will affect developers. Firefox 67 was released on May 21, 2019. Changes for web developers Developer tools. Debugger updates: Column breakpoints allow you to select the specific point (or column) in a line of code where you want the debugger to break (bug 1528417). Prior to Firefox 67, all versions of Firefox installed on a computer would share the same profile by default. Starting with Firefox 67, Mozilla has switched to an individual profile for each.

This article describes problems where Firefox cannot load websites but other Web browsers (such as Internet ExplorerInternet Explorer or Microsoft EdgeSafariEpiphany on Gnome or Konqueror on KDE) can. When this happens, Firefox may show a Server not found or Unable to connect error message.

• For other error messages that display when you try to view websites in Firefox, see Websites don't load - troubleshoot and fix error messages.
• If none of the Web browsers on your computer can load websites, see Firefox and other browsers can't load websites.

Table of Contents

• 5Firefox cannot load certain websites

If you were able to load websites until you updated Firefox or until your Internet security software was updated, reconfigured or a new one was added, your Internet security software (including firewalls, antivirus programs, anti-spyware programs, and more) is likely preventing Firefox from connecting to the Internet.

In general, you should make sure your Internet security software is up-to-date and remove Firefox from your program's list of trusted or recognized programs, then add it back. For instructions on how to configure some programs, see the Configure firewalls so that Firefox can access the Internet article.

If you connect to the Internet through a proxy server that is having connection problems, you will not be able to load websites. To check your connection settings in Firefox:

1. In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ...
2. In the General panel, go down to the Network ProxyNetwork Settings section.
3. In the Network ProxyNetwork Settings section, click .
4. Change your proxy settings:
   • If you don't connect to the Internet through a proxy (or don't know whether you connect through a proxy), select No Proxy.
   • If you connect to the Internet through a proxy, compare Firefox's settings to another browser's (such as Internet Explorer — see Microsoft's guide to proxy settings)(such as Safari — depending on your OS X version, see Mac OS X 10.6: Enter proxy server settings, OS X Lion: Enter proxy server settings, or OS X Mountain Lion: Enter proxy server settings).
5. Close the Connection Settings dialog.
6. Close the about:preferences page. Any changes you've made will automatically be saved.

If you find that changes you make to your Firefox connection settings are not remembered when you restart Firefox, see How to fix preferences that won't save.

Firefox supports IPv6 by default, which may cause connection problems on certain systems. To disable IPv6 in Firefox:

Firefox 67 And 68

1. Type about:config in the address bar and press EnterReturn.
   A warning page may appear. Click to go to the about:config page.
2. In the Search field, enter network.dns.disableIPv6.
3. In the list of preferences, double-clickclick the Toggle button next tonetwork.dns.disableIPv6 to set its value to true.

Firefox attempts to speed up loading new websites by using DNS Prefetching, which can cause page load errors with some system configurations. To disable DNS Prefetching:

1. Type about:config in the address bar and press EnterReturn.
   A warning page may appear. Click to go to the about:config page.
2. Right-clickHold down the control key while you click in the list of preferences, select New, and then select Boolean.
3. In the Enter the preference name field, enter network.dns.disablePrefetch and click .
4. Select true when prompted to set the value and click .

1. Type about:config in the address bar and press EnterReturn.
   A warning page may appear. Click to go to the about:config page.
2. Enter the preference name network.dns.disablePrefetch in the about:config search bar.
   • If the preference doesn't already exist, select Boolean and click the Add button.
3. Press the Toggle button to set the preference value to true, if it's not already set.

If you find that Firefox can load some websites but not others, first clear your Firefox cookies and cache:

1. Click on the menu button to open the menu panel.Click the Library button on your toolbar. (If you don't see it there, click the menu button then click Library.)
2. Click History and select Clear Recent History….
3. In the Time Range to clear: drop-down, select Everything.
4. Below the drop-down menu, select both Cookies and Cache. Make sure other items you want to keep are not selected.
5. Click .

Check for malware

If clearing your cookies and cache did not enable you to load the websites that did not work in Firefox, you should check your computer for malware. Certain types of malware are known to target Firefox and can prevent it from loading various websites:

• If you have an antivirus or Internet security program, update its detections database and do a full scan of your system.
• If you still have problems, follow the instructions in Troubleshoot Firefox issues caused by malware.

A Firefox extension could be causing the issue, especially the ones that have network access and/or those that rely on manipulating webpage content. Heros dmg with zen orb. Try disabling your extensions in the Add-ons Manager one by one and then reload the page. See Disable or remove Add-ons and Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems for more information.

Based on information from Error loading websites (mozillaZine KB)

Mozilla Firefox users are reporting that when they upgrade to the latest Firefox 67, they are finding that their addons are missing, their customizations are gone, and their history is gone. This is being caused by the browser creating new profiles for Firefox 67 and using that instead of the original one.

Firefox keeps user data such as installed addons, browser history, cookies, preferences, and bookmarks in a browser profile. Prior to Firefox 67, all versions of Firefox installed on a computer would share the same profile by default.

Starting with Firefox 67, Mozilla has switched to an individual profile for each installed version of Firefox. This means that a Firefox Nightly install would use a different profile than an installed Beta or Stable build.

For users who want to share the same information between the different profiles, they need to log into their Firefox account on each browser and configure them to synchronize.

Firefox 67 is switching to new empty profiles

Hp easy scan app for mac. For some users, after upgrading to Firefox 67 they are finding that all of their user data is missing [1, 2, 3, 4, 5]. This is being caused by Firefox 67 creating a new user profile and using that instead of the original one.

This is being done even on installs where there is only one version of Firefox running on the computer.

When users go to the Firefox about:profiles page they are seeing that a new profile was created called 'default-release' and that Firefox is using that instead of their original 'default' profile.

In response to one of the reports of this issue, Mozilla developer advocate Dan Callahan, stated that this behavior is most likely being caused by the new separate profile-per-install change in Firefox 67.

We're defaulting to profile-per-install to make it easier to run different versions side-by-side, but you can still manually specify your original profile.
Docs on the profile manager are at https://support.mozilla.org/en-US/kb/profile-manager-create-..

..or, as a super weird hack, you can set the envvar SNAP_NAME=firefox to get the old behavior (see https://github.com/mozilla/nixpkgs-mozilla/issues/163 for context)

In a Mozilla bug report, Dave Townsend, a lead architect for the Firefox front-end, stated that at least one of the user's issues could be related to sharing a profile between the Stable and Beta versions installed on their machine and the new profile policy.

Switching back to your original profile

For users who are affected by this issue, you can switch back to your original profile to restore your addons and user data.

To do this, go to about:profiles and then click on the button labeled Set as default profile under the profile that contains your data.

Once you select that profile, close and start Firefox again and your data should be back.

Some users have reported they have to perform this procedure a few times before it will finally stick. Once you have your original profile back, you can delete the other profiles that you no longer need.

Osu hack mac. If you have the Nightly or Beta versions of Firefox installed, and you are running into a similar issue, its possible that the Nightly or Beta build is using your original profile and new one was created for Firefox 67 Stable.

In this case, you may not be able to downgrade the profile to work with Stable and would have to use a Firefox account to synchronize the profiles.

Firefox 67 Pc