I get continously "THE URL IS NOT VALID AND CANNOT BE LOADED" whereve I am, my homepage or sites I have been using always

Since I downloaded the last Firefox version 3.6 15, no matter where I am, I am back in my homepage and I get the message "The URL is not valid and cannot be loaded", usually I can go back to the site I was in and keep doing whatever I was doing, but often it will happen again.
This is happening in both my computer, laptop and desktop, one has windows XP, the other one has windows 7.
Suggestions? It is becoming a nuisance being moved from the tab I am, and kicked back to the homepage tab

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

Similar Messages

Why do i keep getting box: The URL is not valid and cannot be loaded.

When changing web sites, a dialog box pops up every time Saying "The URL is not valid and cannot be loaded".

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

Tried to open Private browsing and get message "the url is not valid and cannot be loaded"

up graded Firefox directly from older version to latest version and problem cropped up. Latest version on my laptop which is out of service and in shop works fine and on my net book works fine. Should I have done it in steps?

Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
See also:
*[[/questions/908165]] The URL is not valid and cannot be loaded

Why do i keep getting an Alert message saying "The URL is not valid and cannot be loaded "?

Why do i keep getting an Alert message saying "The URL is not valid and cannot be loaded "?
This happens a lot regardless of the web page. I continually have to restart FF and it persists still

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
* [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

When i try to load any page on Mozilla 28 the page opens but i get additional tab saying The address isn't valid The URL is not valid and cannot be loaded.

When i try to load any page on Mozilla 28 the page opens but i get additional tab saying The address isn't valid The URL is not valid and cannot be loaded. I tried everything from reseting Firefox ,completely new installation of firefox to about.config and nothing worked it's been two days now since the problem started and i am pretty frustrated and desperate as i try to fix the issue so please help me with some solutions????
Big thanks in advance

Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
*Do NOT click the Reset button on the Safe Mode start window.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
Delete a possible user.js file and numbered prefs-##.js files and rename (or delete) the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in the current Firefox release.
You can use this button to go to the Firefox profile folder:
*Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
*http://kb.mozillazine.org/Preferences_not_saved

When I open firefox I get this message; The address isn't valid The URL is not valid and cannot be loaded.

I get this message whenever I open firefox or a new tab. Anything I had tabbed to the top has gone, and the original homepage which shows all my recent visits is invalid. The full message is:
The address isn't valid
The URL is not valid and cannot be loaded.
Web addresses are usually written like http://www.example.com/
Make sure that you're using forward slashes (i.e. /).
Try Again.
Help mee!!!

Hi fredmcd-hotmail
It's not that I'm typing anything in wrong, it's when I first open Firefox or a new tab. Instead of displaying the firefox page showing my recently viewed websites it's just an invalid URL. Why would I be blocked from this page?
Thanks

When I click or type in a valid link, I get the message "The URL is not valid and cannot be loaded." I have to reload/refresh the page one or more times until the same page loads.

This happens with small sites as well as major ones such as amazon.com. It happens frequently with many different websites both when typing in a URL or clicking on one from search results or other pages. If I am opening it in a new tab, the page is blank and the correct URL shows in the address bar even though it didn't load. When I get the message "The URL is not valid and cannot be loaded" I have to click okay and then click on the link again or click refresh. Sometimes it loads on the 2nd try; other times I have to refresh multiple times to get it to load.
Anyone know what is causing this or what will help?

* "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
* "Remove the Cookies" from sites that cause problems: Tools > Options > Privacy > Cookies: "Show Cookies"
Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
* [[Troubleshooting plugins]]
See also http://kb.mozillazine.org/Error_loading_websites (Error_loading_some_websites)

I am constantly getting pop ups saying that The URL is not valid and cannot be loaded even though I am on the web page.

I have version 3.6.13 Firefox. I have uninstalled and reinstalled, but still keep getting an error message saying that The URL is not valid and cannot be loaded. This happens even when I am on the web page, but the message continues to keep popping up.

Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
* [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

I am getting this error message, " The URL is not valid and cannot be loaded" when I try to go to Firefox home. I have uninstalled add-ons, uninstaleed and reinstalled a fresh new firefox which did not help

I am getting the following error message, " The URL is not valid and cannot be loaded" when I try to go to firefox home. I uninstalled add-ons , uninstalled Firefox and then installed a fresh version. Still have the problem.
Thanks for the help

That issue can be caused by a corrupted or incomplete Visual C++ installation (multiple versions can be installed side-by-side; SxS) that is missing some runtime components (Redistributable Packages) that Firefox depends on (problem with an embedded manifest file that specifies a specific runtime version).
You need to install the missing components (e.g. VisualC++ 2005 Redistrbutable).
* https://www.microsoft.com/download/en/details.aspx?id=5638
*[[/questions/908165]] The URL is not valid and cannot be loaded
*[https://bugzilla.mozilla.org/show_bug.cgi?id=713167 bug 713167] - Microsoft.VC80.CRT SideBySide errors, browsercomps.dll

I keep getting the alert window that says, "the url is not valid and cannot be loaded"

My computer is "online" but whenever I try to get on a website, the "Alert" box pops up in the middle of my screen saying, "the URL is not valid and cannot be loaded". This is only happening on Mozilla Firefox, I am able to use Internet Explorer without any problems. I do prefer to use Mozilla Firefox as my browser though.

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
* Use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
* Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

When I click on the Home button, I get a message saying "The URL is not valid and cannot be loaded????????"

When I first turn on Firefox, I only get a blank "new tab". It does not go to the Firefox Home Page. When I click on the Home button in the top right, I get the message "The URL is not valid and cannot be loaded." How can I fix this so when I open Firefox it goes right to the Firefox Home Page (or a home page of my own choosing)??

[[How to set the home page]] has detailed instructions.
To get back to the default home page:
# At the top of the Firefox window, click on the Firefox button (Tools menu in Windows XP) and then click Options.
# Select the General panel.
# In the Startup box, click Restore to Default.
If this isn't "sticking", you may have malware or an extension that is preventing you from making the change.

I am getting an Alert, that says, "The URL is not valid and cannot be loaded.

Can't think of anything else to say.

i get the same message, "The URL is not valid and cannot be loaded.".
i've narrowed it down a bit more.
i've got a freshly installed firefox US 9.0.1 on a freshly installed windows xp pro sp3 US (fully patched). a freshly installed separate firefox 3 install is on this machine too, but that does not seem relevant.
the problem only occurs when i load https-urls with invalid certificates (eg self-signed) in the case that i use a firefox with a non-default profile.
so the "default" profile displays a "this page cannot be trusted" screen as expected, i can open the url. but in a different firefox instance/profile, when going to the same https url, i get the error popup. the firefox profile/instance is started like this: firefox.exe -P dev -no-remote.
i have reinstalled firefox 9 & 3 because of this issue. the problem stayed. i didn't remember whether i could load the https url with the default before the reinstall. perhaps i couldn't...

My Browser cannot load web pages. I get The URL is not valid and cannot be loaded"

I can no longer use Firefox. EVERY PAGE I attempt to load produces the following message alert: "The URL is not valid and cannot be loaded"
I have already cleared everything in my browser, rebooted my computer and absolutely nothing works. This just started happening constantly today.

Do other about: pages work properly?
Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.org/kb/Safe+Mode
See also:
*[[/questions/908165]] The URL is not valid and cannot be loaded

Why do I keep getting an error message that reads "The URL is not valid and cannot be loaded."

Whenever I click on a link that opens a new tab using "about:tab", an error pops up. The error box is titled "Alert" and the message reads "The URL is not valid and cannot be loaded."
However, once I click OK, the page loads just fine. At first, I thought it might be one of my add-ons (Iuse a bunch), but it still occurs after restarting in Safe Mode. Any thoughts?
I can even create the problem without clicking on a link inside a page if I simply type about:tab in the address bar.
I am using Firefox 12.0

Wow! I actually solved this on my own. I didn't find any thread that helped, but after reading a few, I figured poking around in about.config would help... and it did!
Here is how I solved the problem:
# Typed '''about:config''' in address bar.
# When I got to the warning about voiding the warranty, clicked '''I'll be careful, I promise!'''
# I found the setting entitled '''browser.newtabl.url''' (use the '''Search:''' box).
# I double-clicked on the entry entitled '''browser.newtabl.url''' and deleted the info in the value portion.
# Clicked '''OK'''.
# Closed the tab.
# Restarted Firefox and problem was solved.

The URL is not valid and cannot be loaded

seems like maybe firefox mishandles untrusted certificates?
It gives error: Alert The URL is not valid and cannot be loaded.
example:
https://notes.corp.cat.com/
other browsers can load this URL just fine. When I visit it in Firefox, I get the error in a simple little message box with a yellow triangle exclamation point, titled "Alert".
ALSO.... when I click the "Home" button in firefox, I get the error, and the home page does not load. Currently the home page is set to "Mozilla Firefox Start Page."
changing the home page to: http://www.google.com/ allows the home page button to work normally.
restoring the home page to default brings the error behavior back when clicking the home button.
changing the home page to: https://notes.corp.cat.com/ produces the same error, just like when I manually type in an https URL with a funky security certificate.
This problem only seems to happen on secure URLs with untrusted certificates, i.e. sites that are too cheap to pay to have their certificate registered with one of the certificate vendors or however the hell that works, so as a result every time you visit their web site, your browser starts to whine that it might be a forgery or whatever.
It used to be in Firefox that I could load these pages and just specify that I want to trust the site anyway. Now firefox gives this error that doesn't allow the user to know what is really going on or what the reason for the error is. It is as if the developers decided that users are too stupid to decide if they really want to visit the site or not, so as a result Firefox is just refusing to visit any web sites where the authenticity of the certificate can't be verified? Hey, it's not a bad idea, to be honest. :-) But it's kind of annoying, because here I am, sort of smart enough to know what I'm doing, but I don't have the choice in the matter...
I restarted with all add-ons disabled and that didn't help. I don't have much installled in the way of add-ons anyway. All I have is JAVA quick starter 1.0, and Adobe Acrobat, Java development toolkit, Java platform SE, Microsoft DRM, and Windows Media Player Plug-in Dynamic Link Library. Not even Flash. All the above is disabled now that I rebooted with add-ons disabled, and I still have the issue.
thanks for any help you can provide.

Please [https://bugzilla.mozilla.org/show_bug.cgi?id=713167 see this.] Installing [https://www.microsoft.com/download/en/details.aspx?id=5638 Visual C++ 2005 SP1] or the .Net Framework 3.5 SP1 may help mitigate the issue.

I get continously "THE URL IS NOT VALID AND CANNOT BE LOADED" whereve I am, my homepage or sites I have been using always

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