Get current page URL from a firefox sidebar extension - firefox

Question

I'm writing a sidebar extension for Firefox and need a way to get the URL of the current page so I can check it against a database and display the results. How can I do this?

Answer 1

I stumbled over this post while looking for an answer to the same question.
Actually I think it's as easy as
alert(window.content.location.href)
See also https://developer.mozilla.org/en/DOM/window.content

Answer 2

window.top.getBrowser().selectedBrowser.contentWindow.location.href;
might work, otherwise I think you need to use:
var mainWindow = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
.getInterface(Components.interfaces.nsIWebNavigation)
.QueryInterface(Components.interfaces.nsIDocShellTreeItem)
.rootTreeItem
.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
.getInterface(Components.interfaces.nsIDOMWindow);
mainWindow.getBrowser().selectedBrowser.contentWindow.location.href;

Answer 3

This seems to work fine for me
function getCurrentURL(){
var currentWindow = Components.classes["#mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator).getMostRecentWindow("navigator:browser");
var currBrowser = currentWindow.getBrowser();
var currURL = currBrowser.currentURI.spec;
return currURL;
}

Answer 4

https://developer.mozilla.org/En/Working_with_windows_in_chrome_code
If you need to access the main browser from the code running in a sidebar, you'll something like what Wimmel posted, except the last line could be simplified to
mainWindow.content.location.href
(alternatively you could use 's API returning an nsIURI).
Depending on your task, it might make sense to run the code in the browser window instead (e.g. in a page load handler), then it can access the current page via the content shortcut and the sidebar via document.getElementById("sidebar").contentDocument or .contentWindow.

Answer 5

If you need only domain and subdomain;
Usage;
PageDomain.getDomain(); // stackoverflow.com
PageDomain.getSubDomain(); // abc.stackoverflow.com
Code;
PageDomain = {
getDomain : function() {
var docum = Components.classes["#mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator).getMostRecentWindow("navigator:browser");
var domain = PageDomain.extractDomain(new String(docum.location));
return domain;
},
getSubDomain : function() {
var docum = Components.classes["#mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator).getMostRecentWindow("navigator:browser");
var subDomain = PageDomain.extractSubDomain(new String(docum.location));
return subDomain;
},
extractDomain: function(host) {
var s;
// Credits to Chris Zarate
host=host.replace('http:\/\/','');
host=host.replace('https:\/\/','');
re=new RegExp("([^/]+)");
host=host.match(re)[1];
host=host.split('.');
if(host[2]!=null) {
s=host[host.length-2]+'.'+host[host.length-1];
domains='ab.ca|ac.ac|ac.at|ac.be|ac.cn|ac.il|ac.in|ac.jp|ac.kr|ac.nz|ac.th|ac.uk|ac.za|adm.br|adv.br|agro.pl|ah.cn|aid.pl|alt.za|am.br|arq.br|art.br|arts.ro|asn.au|asso.fr|asso.mc|atm.pl|auto.pl|bbs.tr|bc.ca|bio.br|biz.pl|bj.cn|br.com|cn.com|cng.br|cnt.br|co.ac|co.at|co.il|co.in|co.jp|co.kr|co.nz|co.th|co.uk|co.za|com.au|com.br|com.cn|com.ec|com.fr|com.hk|com.mm|com.mx|com.pl|com.ro|com.ru|com.sg|com.tr|com.tw|cq.cn|cri.nz|de.com|ecn.br|edu.au|edu.cn|edu.hk|edu.mm|edu.mx|edu.pl|edu.tr|edu.za|eng.br|ernet.in|esp.br|etc.br|eti.br|eu.com|eu.lv|fin.ec|firm.ro|fm.br|fot.br|fst.br|g12.br|gb.com|gb.net|gd.cn|gen.nz|gmina.pl|go.jp|go.kr|go.th|gob.mx|gov.br|gov.cn|gov.ec|gov.il|gov.in|gov.mm|gov.mx|gov.sg|gov.tr|gov.za|govt.nz|gs.cn|gsm.pl|gv.ac|gv.at|gx.cn|gz.cn|hb.cn|he.cn|hi.cn|hk.cn|hl.cn|hn.cn|hu.com|idv.tw|ind.br|inf.br|info.pl|info.ro|iwi.nz|jl.cn|jor.br|jpn.com|js.cn|k12.il|k12.tr|lel.br|ln.cn|ltd.uk|mail.pl|maori.nz|mb.ca|me.uk|med.br|med.ec|media.pl|mi.th|miasta.pl|mil.br|mil.ec|mil.nz|mil.pl|mil.tr|mil.za|mo.cn|muni.il|nb.ca|ne.jp|ne.kr|net.au|net.br|net.cn|net.ec|net.hk|net.il|net.in|net.mm|net.mx|net.nz|net.pl|net.ru|net.sg|net.th|net.tr|net.tw|net.za|nf.ca|ngo.za|nm.cn|nm.kr|no.com|nom.br|nom.pl|nom.ro|nom.za|ns.ca|nt.ca|nt.ro|ntr.br|nx.cn|odo.br|on.ca|or.ac|or.at|or.jp|or.kr|or.th|org.au|org.br|org.cn|org.ec|org.hk|org.il|org.mm|org.mx|org.nz|org.pl|org.ro|org.ru|org.sg|org.tr|org.tw|org.uk|org.za|pc.pl|pe.ca|plc.uk|ppg.br|presse.fr|priv.pl|pro.br|psc.br|psi.br|qc.ca|qc.com|qh.cn|re.kr|realestate.pl|rec.br|rec.ro|rel.pl|res.in|ru.com|sa.com|sc.cn|school.nz|school.za|se.com|se.net|sh.cn|shop.pl|sk.ca|sklep.pl|slg.br|sn.cn|sos.pl|store.ro|targi.pl|tj.cn|tm.fr|tm.mc|tm.pl|tm.ro|tm.za|tmp.br|tourism.pl|travel.pl|tur.br|turystyka.pl|tv.br|tw.cn|uk.co|uk.com|uk.net|us.com|uy.com|vet.br|web.za|web.com|www.ro|xj.cn|xz.cn|yk.ca|yn.cn|za.com';
domains=domains.split('|');
for(var i=0;i<domains.length;i++) {
if(s==domains[i]) {
s=host[host.length-3]+'.'+s;
break;
}
}
} else {
s=host.join('.');
}
// Thanks Chris
return s;
},
extractSubDomain:function(host){
host=host.replace('http:\/\/','');
host=host.replace('https:\/\/','');
re=new RegExp("([^/]+)");
host=host.match(re)[1];
return host;
}
}

Answer 6

From a Firefox extension popup ;
You'll need
"permissions": [
"activeTab"
]
in your manifest or possibly tabs instead of activeTab
async function getCurrentTabUrl(){
let tabs = await browser.tabs.query({active: true, currentWindow: true}) ;
return tabs[0].url ;
}
let hostUrl = await getCurrentTab();
alert(hostUrl);

Answer 7

This works from a firefox "popup" extension.
browser.tabs.query({active: true, windowId: browser.windows.WINDOW_ID_CURRENT})
.then(tabs => browser.tabs.get(tabs[0].id))
.then(tab => {
console.log(tab);
});

Answer 8

Hallo,
I have tried to implement this in JavaScript, because I need that in my project too, but all three possible solutions didn't work. I have also implemented a small site to test it, but this also didn't work.
Here is the source code of the small site:
<html>
<head>
<title>Test</title>
<script type="text/javascript">
function Fall1 () {
alert(window.top.getBrowser().selectedBrowser.contentWindow.location.href);
}
function Fall2() {
var mainWindow = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
.getInterface(Components.interfaces.nsIWebNavigation)
.QueryInterface(Components.interfaces.nsIDocShellTreeItem)
.rootTreeItem
.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
.getInterface(Components.interfaces.nsIDOMWindow);
alert(mainWindow.getBrowser().selectedBrowser.contentWindow.location.href);
}
function Fall3() {
alert(document.getElementById("sidebar").contentWindow.location.href);
}
</script>
</head>
<body>
<form name="Probe" action="">
<input type="button" value="Fall1"
onclick="Fall1()">
<input type="button" value="Fall2"
onclick="Fall2()">
<input type="button" value="Fall3"
onclick="Fall13()">
</form>
</body>
</html>