Firefox

Preference

Allow Pop-ups

Edit `/usr/lib/${FIREFOX_VERSION}/greprefs/all.js` file and ensure the following values

{{
pref("privacy.popups.disable_from_plugins",0);
pref("privacy.popups.showPopupBlocker",false);
}}

Add the following values if there are not present

{{
pref("capability.principal.codebase.p0.granted", "UniversalBrowserWrite");
pref("capability.principal.codebase.p0.id", "file://");
pref("capability.principal.codebase.p0.subjectName", ""); 
pref("privacy.popups.firstTime",false);
pref("privacy.popups.policy",1);
pref("privacy.popups.showBrowserMessage",false);
}}

And then ensure the following values on `/usr/lib/${FIREFOX_VERSION}/defaults/pref/firefox.js`

{{
pref("privacy.popups.firstTime",false);
pref("privacy.popups.showBrowserMessage",false);
}}

Disable status bar

Ensure the following values are present in `/usr/lib/${FIREFOX_VERSION}/greprefs/all.js` file

{{
pref("dom.disable_window_open_feature.status",false);
pref("dom.disable_window_status_change",true);
}}