sorry I forgot the picture...

Two questions :

1) Does the button work as it should ?

2) Are you using a theme  ?

Is that a screenshot from full screen mode or from maximized mode?

What would you expect to see?

Are you using code in userChrome.css for the Tab bar or for other customizations?

• https://www.userchrome.org/what-is-userchrome-css.html

Start Firefox in Safe Mode {web link}

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

McCoy said

Two questions : 1) Does the button work as it should ? 2) Are you using a theme  ?

1) yes 2) the normal dark theme

cor-el said

Is that a screenshot from full screen mode or from maximized mode? What would you expect to see? Are you using code in userChrome.css for the Tab bar or for other customizations?

• https://www.userchrome.org/what-is-userchrome-css.html

Its maximized and I am not using any userChrome.css for customization

FredMcD said

Start Firefox in Safe Mode {web link} A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

No there is no dialog it starts normal as always. Only with this bug in the corner.

It's weird - when you hover over the minimize and maximize buttons, you get what you now see happening with the closing X; normal behavior would be for it to turn red .....

Am I right assuming that you didn't start Firefox in Safe Mode, like FredMcD suggested  ?

Would you expect that the buttons have a dark background?

McCoy said

It's weird - when you hover over the minimize and maximize buttons, you get what you now see happening with the closing X; normal behavior would be for it to turn red ..... Am I right assuming that you didn't start Firefox in Safe Mode, like FredMcD suggested  ? </blockquoW<em>McCoy said

It's weird - when you hover over the minimize and maximize buttons, you get what you now see happening with the closing X; normal behavior would be for it to turn red ..... Am I right assuming that you didn't start Firefox in Safe Mode, like FredMcD suggested  ?

It`s the same nothing changed.

cor-el said

Would you expect that the buttons have a dark background?

Yes

Start Firefox in Safe Mode {web link}

Juliannnnnnnn said

cor-el said

Would you expect that the buttons have a dark background?

Yes

also with the light theme the Buttons have a different colour as everything else

FredMcD said

Start Firefox in Safe Mode {web link}

FredMcD said

Start Firefox in Safe Mode {web link}

The dialog that you said you don't see : that's the Safe Mode Window .....

Don't click on "Refresh Firefox", just click on ""Start in Safe Mode".

If the problem doesn't exist in Safe Mode, then the culprit can be found by (e.g.) re-enabling add-ons one by one.

McCoy said

FredMcD said

Start Firefox in Safe Mode {web link}

It`s still there

McCoy said

FredMcD said

Start Firefox in Safe Mode {web link}

The dialog that you said you don't see : that's the Safe Mode Window .....

Don't click on "Refresh Firefox", just click on ""Start in Safe Mode".

If the problem doesn't exist in Safe Mode, then the culprit can be found by (e.g.) re-enabling add-ons one by one.

The Problem stil exist even in Safe Mode.

Thank you for checking in Safe Mode.

Would you check this in Windows Settings please :

Settings => Personalization => Colors => scroll down to the title bar option.

Is "dark mode" checked  ?

McCoy said

Thank you for checking in Safe Mode. Would you check this in Windows Settings please : Settings => Personalization => Colors => scroll down to the title bar option. Is "dark mode" checked  ?

Dark mode is disabled

Juliannnnnnnn said

Dark mode is disabled

Just as a test : would you enable it, please ?