HTTPS-Everywhere 4.0dev10 slows down or prevents https page loads
Since HTTPS-E 4.0dev10 page load times of https-websites have increased significantly. Sometimes https-websites fail to load completely.
STR:
- Install HTTPS-E 4.0dev10 (or upgrade from 4.0dev9).
- Restart Firefox.
- Try to load several https-sites (with a corresponding HTTPS-E rule enabled) in parallel, in different tabs (like dropbox.com; eff.org; google.com; microsoft.com; mozilla.org; tweakers.net; twitter.com; zotero.org -- typed with or without https-prefix).
- If everything seems to work okay, restart Firefox and repeat step 3 once or twice.
Actual Results: page loads take often more than 1 minute, they sometimes even result in a Firefox connecting error ("The connection was reset").
Expected Result: page loads should be successful and should not take more than a couple of seconds.
Downgrading to HTTPS-E 4.0dev9 or 3.4.1 resolves the problem for me. Disabling all other add-ons doesn't resolve the problem with 4.0dev10.
Tested against: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; !rv:25.0) Gecko/20100101 Firefox/25.0