content.js: Include subdomain

Include the subdomain when matching filenames. This is less general, but
allows us to match more precisely. I needed to modify CSS on a
`subdomain.github.io` blog, and of course we don't want to modify _all_
`github.io` styles.

1 files changed, 1 insertions, 4 deletions

diff --git a/content.js b/content.js
index 0dbcb50..e970e79 100644
--- a/content.js
+++ b/content.js
@@ -21,9 +21,6 @@ if (chrome) {
 	browser = chrome;
 }
 
-var domain = location.hostname
-	.split('.')
-	.slice(-2)
-	.join('.');
+var domain = location.hostname;
 
 browser.runtime.sendMessage({ domain: domain });