Newer versions of the Mozilla Firefox web browser come with a redesigned address bar called Megabar or Quantum bar.
Some Mozilla Firefox users have complained about its default text size new Megabar in Firefox it is a bit small and difficult to read. The problem becomes annoying when users use very high resolution computer monitors.
The Mozilla team has given Firefox a feature that, if enabled, could increase the text size of the new Megabar. This preference is disabled by default and is located at the bottom of the browser about page.
If you want to change the default text size of the new address bar in Firefox and want to increase it, follow these steps:
1. Open Mozilla Firefox and type in a new tab about: config in the address bar and press Enter. It will show you a warning message, click the "Accept risk and continue" button. The Firefox Advanced Preferences page will open.
2. Now in the search filter box enter the following: browser.urlbar.update2.expandTextOnFocus
3. The preference value is set by default as false. To activate manually, double-click browser.urlbar.update2.expandTextOnFocus to change it to true. Alternatively, you can click the toggle icon next to the name of the preference.
4. You will need to restart Firefox to apply the changes.
This is. Restart the Firefox browser and you will now notice an increased text size in the Firefox address bar. The difference is not huge but if you put them side by side you will understand it.
If you want to reset the terms https: // and www in the Mozilla Firefox address bar, set the flag browser.urlbar.trimURLs in False on the same advanced preferences page.
This will cause Firefox to always display the terms https: // and www in front of the URLs.