Fix for pastebin auto login rename the xpi package to .zip and unzip it. File: chrome\content\options.xul After line 10 (10: <preferences>) Add <preference id="pastebin-username" name="extensions.pastebin.username" type="string"/> <preference id="pastebin-password" name="extensions.pastebin.password" type="string"/> After line 29 (29: <rows class="rows">) Add <row> <label value="Username:" class="optionsxul-label"/> <textbox id="paste-username" preference="pastebin-username"/> </row> <row> <label value="Password:" class="optionsxul-label"/> <textbox id="paste-password" preference="pastebin-password"/> </row> Save and close. File: chrome\content\pastebin.js After line 133 (133: //Fill up values from prefs) Add var username = prefManager.getCharPref("extensions.pastebin.username"); var password = prefManager.getCharPref("extensions.pastebin.password"); After line 146 (146: document.getElementById('paste-name').value = title;) Add document.getElementById('pastebin-username').value = username; document.getElementById('pastebin-password').value = password; Save and close defaults\preferences\prefs.js Add line 1 and 2 pref("extensions.pastebin.username", ""); pref("extensions.pastebin.password", ""); Save and close