1.2.1) File Menu -> New   Window (and all the drop down menus with spaces)
  1.2.2) Edit Menu -> Select     All (and all the drop down menus with spaces)
  1.2.3) View-> Page     Style (and all the drop down menus with spaces)
   1.2.4) All the rest of the menus where ever there is a space there is a double space

   THIS URL looks to be double spaced on firefox https://support.mozilla.org/en-US/questions/1338204?page=2
   like below

   Any number displayed is double spaced in the browser output (most of the times, most of the web pages)
   
   

 https://support.mozilla.org/bm/questions/1350754
 https://support.mozilla.org/en-US/questions/1186601
 https://support.mozilla.org/en-US/questions/1338204?page=2
 https://superuser.com/questions/1654597/firefox-menus-became-double-spaced-in-latest-update-i-want-to-return-to-single

There is a specific challenge that i am facing with Firefox and some of the solutions that i have tried is not helping me to resolve the issue. What's the issue: There are double spaces issue in Firefox Where is it : 1) Menu 1.1) It's in the Menu New Tab is seen to me as New Tab (more spaces are for demonstration only) 1.2) All the Menu items which have space are show with more then one space including 1.2.1) File Menu -> New Window (and all the drop down menus with spaces) 1.2.2) Edit Menu -> Select All (and all the drop down menus with spaces) 1.2.3) View-> Page Style (and all the drop down menus with spaces) 1.2.4) All the rest of the menus where ever there is a space there is a double space 2) URL : I type something in the URL and they are double spaced "this is test" will look like "this is test" THIS URL looks to be double spaced on firefox https://support.mozilla.org/en-US/questions/1338204?page=2 like below 3) Numbers in the browser : Any number displayed is double spaced in the browser output (most of the times, most of the web pages) 4) Bookmarks : All bookmarks are double spaced 5) Settings: Settings: I have tried some suggestions below and they did not work for me. browser.proton.contextmenus.enabled browser.proton.contextmenus.enabled is still set to false but seems to have no effect toolkit.legacyUserProfileCustomizations.stylesheets=true browser.proton.contextmenus.enabled=false 6) Reference: I have tried some suggestions below and they did not work for me. https://support.mozilla.org/bm/questions/1350754 https://support.mozilla.org/en-US/questions/1186601 https://support.mozilla.org/en-US/questions/1338204?page=2 https://superuser.com/questions/1654597/firefox-menus-became-double-spaced-in-latest-update-i-want-to-return-to-single