I posted this question some days ago at https://support.mozilla.org/en-US/questions/1184096#answer-1027064 and I marked it as solved. This question here is a continuation. I did not succeed to re-change the above posted question to unsolved. So I made a new question here. Usually I am working with black background and white letters and choose: Open Menu --> Configuration --> Contence --> Colors --> (I choose black background and white letters), --> Choose elected Colors instead of those on webpage --> Always. Some webpages, however dont work: They show black letters on black background. So I temporarily have to switch back the whole row of instructions with "Never" instead of "Always". Shortly afterwards I choose the whole row of instructions again with "Always" at the end. I would like to have a keyboard shortcut for this color change. How to "program" this ? Can I create a macro like in open office, where the programs keeps a row of mouse clicks in mind, or do I have to install an addon ? (Home: Iceweasel 52.2.0 on Debian 8, Job probably the actual Firefox on win7) Thanks for support. I got successful solution in above posted question, before firefox changed to Quantum. But then ... Hi, here I am again. Firefox on win7 updated itself to firefox Quantum ... and the addon is not running any more. Well, short pleasure 8-| . I tried several addons (suitable for Quantum and not suitable). I got none of them running. Was anyone successful in getting the color toggle functionality running on firefox Quantum ? Thanks for help.