Firefox has a few different bars you may see in that position include: blocked a popup, prevented a redirect, need to approve a plugin. Is it one of those?

Regarding plugins, most are set to "Ask to Activate" by default. Here's how it works, using Flash as an example:

When you visit a site that wants to use Flash, you should see a notification icon in the address bar and usually (but not always) one of the following: a link in a black rectangle in the page or an infobar sliding down between the toolbar area and the page.

The plugin notification icon in the address bar typically looks like a small, dark gray Lego block. (When the page wants to use a plugin with known security issues, the icon turns red to alert you to the concern.)

If you see a good reason to use Flash, and the site looks trustworthy, you can go ahead and click the notification icon in the address bar to allow Flash. You can trust the site for the time being or permanently.

But some pages use Flash only for tracking or playing ads, so if you don't see an immediate need for Flash, feel free to ignore the notification! It will just sit there in case you want to use it later.

Now... let's say you are weary of approving plugins. You usually can change the permission so any site can use them automatically. To do that, open the Add-ons page using either:

• Ctrl+Shift+a
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Plugins. On the right side, look for the relevant plugin and set its permission to "Always Activate".

If your Flash doesn't allow this, you might not have the latest version. You can get that here:

https://www.adobe.com/products/flashplayer/distribution3.html

In the first table, look for the row for "plugin-based browsers" and you can use either the EXE or the MSI installer.

To ensure that the old version is removed, please close any tabs that are using Flash, or exit out of Firefox, during the update.

If it isn't one of Firefox's bars, try disabling your McAfee extension in case it is the culprit. You can do that on the Add-ons page. Either:

• Ctrl+Shift+a
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Extensions. Then look for McAfee on the right.

Often a link will appear above at least one disabled extension to restart Firefox. You can complete your work on the tab and click one of the links as the last step.

Any difference?

Not a plug-in. The whole message is as follows: Firefox prevented this page from automatically redirecting to another page. Then on the right of the bar it says: "Allow" on a button, or "x". It appears even when I log into my online banking.

You might have accidentally turned on an accessibility feature. To turn off the redirect block, you can use the Advanced panel of the Options page:

"3-bar" menu button (or Tools menu) > Options > Advanced

On the General mini-tab, in the Accessibility section, uncheck the box for "Warn me when websites try to redirect or reload the page"

Does that fix it?