"The URL is invalid and cannot be loaded"

Why a URL cannot be loaded

• The message that the URL is invalid and cannot be loaded always appears when you want to access a website. This can happen while Firefox is running, but it can also happen when you start the program.
• A common cause is that an incorrect URL, that is, a misspelled Internet address, is given somewhere. This means that the page may not even exist. Since the browser cannot connect to a non-existent website, the error is displayed.
• Another cause is that there is no internet connection. The reasons for this can be with your computer or with your internet provider.
• Basically, however, you will find that you can get the error away pretty quickly. For this, you should only gradually rule out the causes.

When the internet address is invalid

1. First you should check whether the address of the entered page is correct. For example, if a typing error has crept in, the program will not find the page and thus display the error message.


This connection is not trusted - this is how you solve the problem on Facebook

If a security certificate is classified as invalid under Mozilla Firefox, ...

2. If the address is correct, you should check your Internet connection. Because if a URL is invalid in Firefox and could not be loaded, there may only be a malfunction.
3. You can check the Internet connection using another browser, for example the Internet Explorer, which is often pre-installed. If the calling up of pages does not work there either, there is a malfunction and you must contact your network operator to find out more.
4. If the call works, the problem is with Firefox. Here you should first delete your history and cookies. This can be done in the open program under "Extras".
5. If none of this works, uninstall Firefox. This is possible via "Start" -> "Control Panel" -> "Programs". After uninstalling, download the latest version that is correct for your system from a trustworthy side download and reinstall the browser.