You say this is on several websites?

Are you using any blocking programs/add-ons?

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

You posted with a mobile device.

• User Agent: Mozilla/5.0 (Android 6.0.1; Tablet; rv:55.0) Gecko/55.0 Firefox/55.0

Do you have this problem on that device or on a desktop computer?

You can right-click this element and select "Inspect Element" to open the builtin Inspector with this element selected to see if you get the correct element or if ther is another element overlaying this element.

• https://developer.mozilla.org/en/Tools/Page_Inspector

I am using Samsung galaxy tab. I do have Panda mobile security and also use Opera VPN used for a long time. This is a fairly recent problem. I on other browsers.

Updates are supposed to improve their programs. But sometimes they also cause problems.