1. Adblocker | https://chrome.google.com/webstore/detail/adblock/gighmmpiob...
2. Stayfocused | https://chrome.google.com/webstore/detail/stayfocusd/laankej...
3. Papaly | https://chrome.google.com/webstore/detail/new-tab-bookmark-s...
4. Codota | https://chrome.google.com/webstore/detail/codota/cnpdaoipdfb...
5. ZenHub for GitHub | https://chrome.google.com/webstore/detail/zenhub-for-github/...
Chromium issue 441500:
"Popup UI of extensions causes systematic memory leaks" [1]
Related?
This was finally fixed yesterday, but we will probably have to wait until Chromium 43 for the fix.
[1] https://code.google.com/p/chromium/issues/detail?id=441500