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Most problems with Firefox can be fixed by following the troubleshooting methods described below. Try these steps in order. If one doesn't work, move on to the next one. If you need extra help with any of this, we have a community of volunteers standing by.

Table of Contents

1. Apr 06, 2020  Ok HELP!! This is going to be long. My mac went crappy might be the hard drive, I had a back up with time machine on a 1 TB drive. So I restored my drive but I used the wrong account! Not Apple ID, but account in my Mac. It was from when I first bought my Mac and transfer the data from an airbook, but I don’t use that account.
2. Need to move Bookmarks, Extensions & Add-Ons to another Mac; Text of website is missing the charakters x, y, z but only in lower case where x is not simply missing but replaced by 'If I start Firefox by clicking a link in another application or operating system a window without Menu Bar items is opened; Disable.
3. Oct 22, 2019 Well, For some, There are newer WebExtension-compatible ones (different developer) that build upon older Legacy Extensions (up to firefox 56). But extensions aren´t really 64-bit/32-bit; they are simple.xpi scripts I suppose, and run within the larger framework of Firefox 56.0.2 which in this case is 64-bit and should run in Catalina.
4. Apr 15, 2020  When you have a compatible Mac and the macOS Catalina download completes, but there’s no prompt for the installation to continue, then search in your Mac’s application folder for a.
5. Now fix macOS Catalina Errors on VMware. For some of the popular ones or simple, we’ve provided the step by step tutorial that we’ll redirect you to those. It’s worth noting that a huge part of these solutions relates to all those of smart users who figured out the solid fixes to.

• 7Other solutions

Sometimes problems can be fixed by simply restarting your computer and then starting Firefox again.

The first main reason why users can’t install macOS Catalina is compatibility problem. If your Mac doesn’t support macOS Catalina, you won’t be able to proceed with the installation. You need a fairly recent Mac to be able to run macOS Catalina. Here are the Mac models.

Many problems with loading web pages can be resolved by clearing Firefox's cookies and cache:

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

Firefox Safe Mode is a troubleshooting mode that disables extensions, uses the default theme, turns off hardware acceleration and uses default toolbar settings, among other changes (see this article for details). To start Firefox in Safe Mode:

1. Click the menu button , click Help and select Restart with Add-ons Disabled…. Firefox will start up with the Firefox Safe Mode dialog.
   Note: You can also start Firefox in Safe Mode by holding down the shift key while starting Firefox.holding down the option key while starting Firefox.quitting Firefox and then going to your Terminal and running: firefox -safe-mode
   You may need to specify the Firefox installation path (e.g. /usr/lib/firefox)
2. In the Firefox Safe Mode dialog, click .
3. Check whether your problem is still happening while in Safe Mode.

• If the problem still happens in Safe Mode, go on to step 4.
• If the problem does not happen in Safe Mode, see Turn content blocking off on individual sitesWhat to do if a site seems broken, if certain websites only work correctly while in Firefox Safe Mode. For other issues, follow these instructions to troubleshoot extensions, themes and hardware acceleration.

Some Firefox issues can be caused by a problem with one of the Firefox program files. Follow these steps to completely remove and reinstall Firefox. This process will not remove your Firefox profile data (such as bookmarks and passwords), since that information is stored in a different location.

1. Download and save the installer for the latest official version of Firefox from mozilla.org.
2. Exit Firefox (if open): Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
3. Uninstall Firefox from your computer.
4. Delete the Firefox program folder, which is located in one of these locations by default:
   • C:Program FilesMozilla Firefox
   • C:Program Files (x86)Mozilla Firefox
5. Reinstall Firefox using the installer you downloaded earlier - see How to download and install Firefox on Windows for instructions.

1. Download the latest official version of Firefox from mozilla.org.
2. Quit Firefox: Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
3. Uninstall Firefox from your computer by opening the Applications folder in the Finder and dragging the Firefox application to the Trash.
4. Reinstall Firefox - see How to download and install Firefox on Mac for instructions.

1. Download the latest official version of Firefox from mozilla.org.
2. Quit Firefox: Click the Firefox menu and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu and select Quit.
3. Uninstall Firefox - If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux for details. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory to uninstall Firefox.
4. Reinstall Firefox - see Install Firefox on Linux for instructions.

Now start Firefox and check to see if your problem has been fixed. If it hasn't, continue with the next troubleshooting method.

The Refresh Firefox feature can fix many issues by restoring your Firefox profile to its default state while saving your essential information.

1. Click this Refresh Firefox button directly, if you are viewing this page in Firefox. This won't work if you are using a different browser or a mobile device.
   • You can also find a Refresh Firefox button at the top of the Firefox about:supportTroubleshooting Information page.
2. To continue, click in the confirmation window that opens.
3. Firefox will close to refresh itself. When finished, a window will list your imported information. Click and Firefox will open.

Sometimes files in your Firefox profile folder that correspond to the essential information that a Firefox Refresh doesn't remove (such as bookmarks and browsing history) may be causing the issue. You can create a new, additional profile which will not contain any of your old Firefox data. See the Profile Manager - Create, remove, or switch Firefox profiles article for instructions.

If you've tried all of these troubleshooting methods and you're still having problems, here are some other solutions you can try:

Check browser internals

The Firefox Task Manager (about:performance page) lets you see what tabs or extensions are slowing down Firefox. Telemetry Data shared with Mozilla (about:telemetry page) contains detailed data about performance, hardware, usage and customization. The Troubleshooting Information page (about:support page) includes other about: page links and troubleshooting resources. (For a list of all about: pages, enter about:about in the address bar.)

Troubleshoot the Flash plugin

See Flash Plugin - Keep it up to date and troubleshoot problems.

Check for conflicts with your Internet security software

Some Internet security software (including antivirus, antispyware, and firewall programs) can cause problems with Firefox including blocking it from opening websites, crashes, and more. Often you can open the program's settings, remove Firefox from its list of allowed or trusted programs and it will be re-detected and things should start working again. If your program is listed at the Configure firewalls so that Firefox can access the Internet article, you can get specific instructions for how to properly reconfigure it.

Check for malware

Malware (short for 'malicious software') can cause problems with Firefox. Periodically, you should scan your system for viruses, spyware, or other malware. For more information, see Troubleshoot Firefox issues caused by malware.

Based on information from Standard diagnostic - Firefox (mozillaZine KB)

New macOS updates always come with problems. The same applies to Catalina.

Although Catalina might seem to have had a great start, issues are now slowly surfacing. And recently, Mac users who had just updated to this new macOS reported having problems with their WiFi. According to them, Catalina caused the WiFi to stop working on their Macs.

Common Problems and Fixes to Macs That Won’t Connect to a WiFi Network After the Catalina Update

WiFi not turning on after updating to Catalina? Can’t access the web after installing Catalina? Is the WiFi icon not showing after the update? Whether it’s true or not that Catalina caused the WiFi issue, we’ve got great news. We have prepared a few handy fixes that can possibly fix your WiFi problem. Check them out below!

Problem: Updated to Catalina and WiFi Stopped Working

Some Mac users said their WiFi had simply stopped working after updating to Catalina. Whenever they attempt to connect, nothing happens.

Fix: Restart the Connection

How To Fix Firefox For Mac Catalina Island

To fix the issue, try to restart your WiFi network. Click the WiFi icon on your Mac and turn the connection off. Wait for 15 to 20 seconds before reconnecting to it. Do this a couple of times.

If it does not work, try to restart the router itself. Sometimes, it’s the ISP that’s having problems. To restart your router, switch it off, wait for 10 seconds, and turn it back on.

Now, if restarting the connection and the router doesn’t resolve the problem, restart your Mac in Safe mode and check if the WiFi is working.

Here’s how to restart your Mac in Safe mode:

1. Turn off your Mac.
2. After you hear the startup tone, press the Shift key and hold it.
3. Release the key the moment the Apple logo appears.
4. Choose Safe Boot from the list of options on the startup screen.

If the WiFi is working fine in Safe mode, it is likely that incompatible extensions and apps are causing the problem. Fix it by installing the app and extension updates that are compatible with Catalina.

To update apps and extensions, follow these steps:

1. Go to the Apple menu.
2. Select System Preferences.
3. Choose Software Update to check for any updates.
4. If an update is available, click the Update Now button next to it to start the installation.

Should you wish to automatically install apps and macOS updates in the future, do steps 1 and 2. And then, choose Automatically keep my Mac up to date. When your Mac detects new updates, it will send you notifications.

Problem: an Exclamation Point on the WiFi Icon

Can’t connect to a WiFi network after updating to Catalina? Are you noticing an exclamation mark on the WiFi icon on your Mac? Then it is possible that a network error exists or a hardware component is at fault.

Fix: Acquire a New DHCP Lease Address

To fix the problem, you might need to renew your DHCP lease address or acquire a new one, which establishes a connection with a new IPv4 address, router, and subnet mask. Here’s how to renew your Mac’s DHCP lease address:

1. Go to the Apple menu.
2. Choose System Preference.
3. Select Network.
4. Navigate to the WiFi Your Mac should then start connecting to a WiFi network. If you are seeing an exclamation point, click Keep Selected WiFi.
5. Locate the Advanced option.
6. Open the TCP/IP Here, you will see three IP addresses. If you don’t see any, you have to click Renew DHCP Lease.
7. Now, try to reconnect to the WiFi network.

Problem: WiFi Problems Still Exist After Renewing the DHCP Lease Address

You’ve restarted the router. You’ve also renewed your DHCP lease address. But the problem is still there. What should you do? The i386 architecture is deprecated for macos.

Fix: Delete the WiFi Profile from the List

Deleting the WiFi profile from the list of networks saved on your Mac usually does the trick. Here’s how you do it:

1. Go to the Apple menu and navigate to System Preference > Network.
2. Click on the WiFi profile of the problematic network.
3. Tap on the minus (-) sign to delete it from the list.
4. Hit Apply.
5. Now, add the WiFi profile again. Click the plus (+) sign and choose WiFi.
6. Give the network a name.
7. Hit Create.
8. Next, click Advanced.
9. Navigate to the TCP/IP section.
10. Click Renew DHCP Lease.
11. Go to the DNS section.
12. Click the plus (+) sign to add a new Google IP address.
13. Click the sign again to add a second IP.
14. Now, navigate to the Hardware tab and select Configure Manually.
15. Select MTU Set Custom and input 1453.
16. Hit Apply to save the changes.
17. Finally, switch off the WiFi network and turn it on again.

Problem: Connected to a WiFi Network, But Safari Doesn’t Load

There are times when you are already connected to a WiFi network, only to find that your browser does not load. Worse, it does not even connect to the server.

Fix: Check Safari Extensions

If you have successfully connected to a WiFi network but your web browser does not load, the problem might be with the extensions, cache, or cookies. To fix it, simply clear your cache, remove the cookies, and delete any unnecessary web data stored on your Mac.

1. To delete Safari’s cache, open Safari and click the drop-down menu.
2. Go to Preferences.
3. Navigate to the Advanced tab.
4. Open the Show Develop menu.
5. Close the Preferences window.
6. Click the Develop drop-down menu.
7. Hit the Empty Cache button.

If the manual process seems too overwhelming to you, opt to automate the process. For this, you will need a reliable third-party Mac repair tool like TweakBit MacRepair. Once you have installed it, run a quick scan to find any junk files, such as browser cache and cookies. It’s that easy!

What’s Next?

Assuming you’ve done everything but the WiFi problem persists, your last resort is to seek help from experts. Take your Mac to a nearby Apple Center and have an Apple Genius check the problem.

Firefox For Mac Catalina

Do you know other workarounds that can resolve WiFi-related problems associated with the Catalina update? Let us know in the comments!

How To Fix Firefox Browser