Firefox not starting up mac

If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux. If you downloaded and installed the binary package from the Firefox download page , simply remove the folder firefox in your home directory. Now, go ahead and reinstall Firefox: Double-click the downloaded installation file and go through the steps of the installation wizard. Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.

Please report back to say if this helped you! Thank you. Certain Firefox problems can be solved by performing a ''Clean reinstall''. Download the latest Desktop version of Firefox from [https: After the download finishes, close all Firefox windows or open the Firefox menu [[Image: New Fx Menu]] and click the close button [[Image: Close 29]].

If you downloaded and installed the binary package from the [http: Doing so could permanently delete your [[Profiles Firefox profile]] data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. Bug and https: FredMcD Top 10 Contributor solutions answers. If you still have problems; Start '''[https: Try '''Safe''' web sites. Question owner bspeakes said I've used Firefox for years.

Are you using "Clear history when Firefox closes" to clear the cookies?

How to fix Firefox problems on Mac

Do not remove user information. After, reboot the computer. Then the full installer. Start your Computer in safe mode. Then start Firefox. Try Safe web sites. If running, turn your computer off. Remove any disks and thumb drives that are in your hard drives or ports. Now start your computer but also;.

✔Your Connection Is Not Secure Error On Almost All Sites Including Google On Firefox [100 % Fixed!]

Hold down the Shift key. For example, "runlevel 1" is typically the equivalent to Windows and Mac safe modes. When the Boot menu is displayed, release the key you were pressing. You must now choose what mode you want. For basic information, you can use Mac's native Activity Monitor.

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However, to see the whole picture, get a pro-level app, such as iStat Menus. If you see Firefox using too much memory or CPU, you need to take some action. It's very likely that one of your installed plugins is the culprit. To check for that, click the Menu button, and then choose Add-ons. In the Add-ons Manager's Plugins panel, you can select Never Activate for each plugin, then restart Firefox and see if the problem is still happening.

If the problem is gone, turn the plugins back on one by one, just changing that Never Activate option back to Always Activate. Restart Firefox each time and then try to recreate the error. Once the problem reappears, you'll know it was likely caused by the last plugin you re-enabled.

What are the most frequent problems with Firefox?

You can also remove a plugin with CleanMyMac 's Extensions tab, which is actually a lot easier than using Firefox. In Firefox itself, you have to type about: Mozilla then recommends you change the filename to add an X in front, which will remove the plugin. You can reinstall a fresh copy of the plugin from official sources only! To check your extensions in Firefox, go to about: You can disable extensions here, and then turn them back on one by one, in the same way you just checked your plugins.

Firefox won’t launch?

If you want to remove all your extensions and start fresh, you can click the Remove button or use the Extensions tab in CleanMyMac, which manages extensions, add-ons, and plugins from one place. Preventing Flash content from loading automatically deserves a separate explanation. Some websites use way too much Flash content, and loading and playing all of that uses up your computer's resources, especially if you keep a lot of tabs open. Luckily, you can tell Firefox to stop loading Flash content by default, until you ask for it.

Or press Command-Shift-A, or type about: It all takes you to the same place. Change the dropdown from Always Activate to Ask to Activate. After that, websites will display an Activate Adobe Flash button in place of Flash content, and all you have to do is click that to allow Flash to display it. But if you're still experiencing troubles, there is more you can do. Read on. Whether Firefox shows you an error message every time you try to launch the app or right when you're in the middle of a working session, there is only one way to fix that — reinstall the application.

The easiest way to reinstall Firefox is to quit it, delete the Firefox file from your Applications folder, and download the new version from the official Mozilla website. That will uninstall the application but keep all your user data intact, and when you reinstall a new copy, you bookmarks and passwords will still be there. But that's not the best way to do it, since Firefox leaves all kinds of data on your hard drive besides the main application file. There are rare cases when the "Firefox quit unexpectedly" message could be caused by the Mac security update.

This happens when your Mac's firewall used to recognize previous versions of Firefox but no longer trusts the new one. Follow official Mozilla documentation to fix this issue.

So your Firefox is fast and doesn't randomly quit, but still doesn't seem to load websites. There are a few things that might cause this, so let's zero in on the problem by gradually excluding various perpetrators. Turn your modem off and on helps in nearly all cases. As soon as you launch NetSpot , make sure it's set to Discover mode, and it will scan all nearby WiFi networks automatically.

WiFi Explorer is just as easy — launch the app and click the play button to analyze the network quality around you. If your WiFi network seems to be fine, it's good to check whether the connection works in other browsers, like Safari or Chrome, just to make sure that the problem in fact is with Firefox specifically.

Then, check the settings in your firewall by following the steps outlined by Mozilla. If upon loading the website you get the "Proxy server is refusing connections" message, there is an easy fix for that. In case Firefox shows you that it has troubles validating some website's security certificate, it might be related to improperly set date and time on your system.

Another option you can try is flushing the DNS cache, which acts as a temporary database, storing all sorts of connectivity logs and website access attempts. Combine flushing the DNS cache with clearing out cache and cookies from Firefox, and restarting your Mac to get the best result. If you are still experiencing troubles loading websites, it could be that DNS prefetching is at play. Usually Firefox tries to speed up loading new websites by using DNS prefetching, but it can also cause loading errors with some system configurations.