Since the last update of Firefox (58) the reload button no longer appears on the extension page or options page. That is a problem for me.
And the trick with user.css to maintain the button on the right of the address bar doesn't work to.

I try to modify this "browser.pageActions.persistedActions" in about:config

This
{"version":1,"ids":["bookmark","bookmarkSeparator","copyURL","emailLink","sendToDevice","canvasblocker_kkapsner_de","_owl-comfortable-reading-addon","_e1ed7a80-7c11-4f7e-968b-79b551a0067f_"],"idsInUrlbar":["canvasblocker_kkapsner_de","_owl-comfortable-reading-addon","_e1ed7a80-7c11-4f7e-968b-79b551a0067f_","bookmark"]}

To this
{"version":1,"ids":["bookmark","bookmarkSeparator","copyURL","emailLink","sendToDevice","canvasblocker_kkapsner_de","_owl-comfortable-reading-addon","_e1ed7a80-7c11-4f7e-968b-79b551a0067f_"],"idsInUrlbar":["canvasblocker_kkapsner_de","_owl-comfortable-reading-addon","bookmark","_e1ed7a80-7c11-4f7e-968b-79b551a0067f_"]}

But it does nothing. I know it's a little bit persnickety but I really want to have it on the far right of the URL bar.
I'm pretty newbie in coding and programming stuffs so I'm trying steps by steps. If anybody can help it will very welcomed.

If nothing can be done to remedy these two points I will give up the add-on to use the default reload button, outside the URL bar... Sadly.