Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

When I open Firefox I get the message "This address is not valid". What does this mean?

  • 5 replies
  • 3 have this problem
  • 40 views
  • Last reply by FredMcD

more options

I have just installed Firefox. When I try to open the program, I get the message "This address isn't valid". Why do I get this message? How do I correct Firefox so that it opens with my browser?

I have just installed Firefox. When I try to open the program, I get the message "This address isn't valid". Why do I get this message? How do I correct Firefox so that it opens with my browser?

Chosen solution

I do not understand the solutions. For someone new to Firefox, this is overwhelming. Ins't there someone that I can chat with.

Read this answer in context 👍 0

All Replies (5)

more options

It sounds like a problem with your homepage setting.

Type about:preferences#general<enter> in the address bar.

There are two settings;

  • When Firefox Starts

When the browser is started, what do you want to display. Many of us choose Show My Home Page.

  • Home Page

When a new page is opened, what do you want displayed.

  1. Use Current Page. Use what ever page(s) are open at that time.
  2. Use Bookmark
  3. Restore To Default. about:home shows a Mozilla home page with tools.

You can use any of these that you wish;

about:home (Firefox default home page), about:newtab (shows the sites most visited), about:blank (a blank page),

or you can enter any webpage or about: page you want.

more options

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: "3-bar" menu button or Tools > Add-ons > Appearance
  • Do NOT click the "Refresh Firefox" button on the Safe Mode start window
more options

Chosen Solution

I do not understand the solutions. For someone new to Firefox, this is overwhelming. Ins't there someone that I can chat with.

more options

A post was flagged as Solved Problem. Please remove that flag. If you don’t, others that can help may not read this post.

Go to that message, and use the link to it's right.

more options

Bobboo said

I do not understand the solutions.

What is it you want to do?