How can I disable an Alert that indicates:"The URL is not valid and cannot be loaded".

This Alert frequently pops up even after I've accessed a valid URL site on Firefox. Sometimes it takes 2 or 3 clicks to close the Alert window.

Start Firefox in [[Safe Mode]] to check if one of the extensions 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.com/kb/Safe+Mode
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Similar Messages

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...

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")

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")

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.

Private Browsing function is suddenly not working. Error message :"The URL is not valid and cannot be loaded." How can I repair?

Private Browsing function is suddenly not working. Error message :"The URL is not valid and cannot be loaded."
How can I fix it?

Start Firefox in [[Safe Mode]] to check if one of the extensions 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.com/kb/Safe+Mode
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

When I click on "Sign in to Sync" the page "about:accounts" shows error "The URL is not valid and cannot be loaded." How do I fix this so I can use Sync?

When I click on the three-bar icon (top right) and then on "Sign in to Sync" a new tab opens attempting to load "about:accounts" . . . the page that loads is an error . . . "Problem loading page" shows up on the tab and the page displays:
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
I am running Firefox 30.0 on a Dell XPS-18 and Windows 8.0.
I cannot access "about:accounts" at all. How do I fix this?

The about:accounts page is a valid page in the current Firefox release.
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

How do I enable Firefox 4 to do a search on more than one word (e.g. "yahoo mail") without receiving the error message "the URL is not valid and cannot be loaded"?

After loading Firefox 4.0, I changed the address bar search engine to Google Search by Name, so I'd be taken straight to the most relevant webpage when I type in a word.
It works fine when I type in one word, but if I use a search with more than one word (e.g. "yahoo mail" or "google maps") I get an alert saying "The URL is not valid and cannot be loaded". Is there any way I can fix the address bar to accept multiple word searches?
I've tried disabling all my add-ons, but it didn't make any difference.

Hi, this should sort out your problem:
1. Type in "about:config" into the address bar, this will open the settings menu. Click on "I'll be careful, I promise!"
2. Search for "keyword.URL" in the filter bar.
3. Enter "http://www.google.com/search?btnI=I%27m+Feeling+Lucky&q=" into the value field.
I'm no expert, but I had the same problem which got on my nerves after being so used to being able to type anything in, and following these steps fixed it.

When we connect to the internet or visit a new web page, a new tab opens and an alert pops up as follows: "The URL is not valid and cannot be loaded"

When we start the internet or navigate to a new page, a new tab opens with the following alert: "The URL is not valid and cannot be loaded." We "x" out of it, but a new tab, with the same alert appears. The problem occurs again when we try to navigate to another web page. A real nuisance. We've scanned the computer but found nothing but Adware cookies.
== This happened ==
Every time Firefox opened
== 5/20/10

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).
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.
You can use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

When clicking on making a new tab it comes up with "The URL is not valid and cannot be loaded" how do i fix this

The URL is not valid and cannot be loaded keeps coming up whenever making a new tab. can not seem to fix have firefox 3.6.13

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")

Why does Firefox warn me "The URL is not valid and cannot be loaded" on just about everysight that I go to including my MSN homepage

When I open firefox and go to my home page I get The URL is not valid and cannot be loaded. This also happens when I access other pages. I click ok and then it opens up but I'm ready to go back to IE

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). 
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. 
You can use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions. 
You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

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")

How can i fix "the url is not valid and cannot be loaded error firefox"?

anyone know what that error message is about?

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).
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.
You can use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions.
You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

Can't view frontview home page of netgear NAS, "The URL is not valid and cannot be loaded"

Did a clean install of win XP x64 after a registry problem gone bad. At the same time updated from ff 8.x to the newest 9.0.1 and can at the present not log on to the readynasNV+ from netgear using it's web interface. Also can't view the bitorent page of same machine. On the previous version I got a security pop-up with this but after puting that aside as an exception no further problems with it. I can acces it in IE 6.0 no problem except for similar security pop-ups.

Right, went looking for anything related to 10.0.0135 witch was the adress the working one was on and found that there was an exception in tools, advanced, encryption, certificates, servers tab. Then added an exception for 10.0.0.136 witch resulted in the add exception popup I had in previous versions, one click and it's now working !. Hope this helps anyone experiencing similar trouble for similar equipment.

I keep getting this alert: The URL is not valid and cannot be loaded. What does this mean and what do I need to solve this?

Everytime I try to open an email or any other site, I keep getting the above message and it keeps kicking me out of system.

Do you have that problem when running in the Firefox SafeMode? 
[http://support.mozilla.com/en-US/kb/Safe+Mode] 
''Don't select anything right now, just use "Continue in SafeMode."''
If not, see this: 
[http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes]

How can I disable an Alert that indicates:"The URL is not valid and cannot be loaded".

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