User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0 Build ID: 20150316004007 Steps to reproduce: I entered the following script in the URL bar : data:text/html,<script>location+=location+'A'.repeat(100000000);</script> Actual results: Firefox crash instantly. Expected results: Nothing much.

Does it actually crash or "just" hang? Do you have a crash report ID for this crash if it does crash (about:crashes has these) ?

(In reply to :Gijs Kruitbosch from comment #1) > Does it actually crash or "just" hang? Do you have a crash report ID for > this crash if it does crash (about:crashes has these) ? I don't know, there's no crash report ID. It just not responding to anything.

Its not reproducible with build #39.0a1 (2015-03-25) Page reloaded with following message. "Bad news first: This tab has crashed Now for the good news: You can just close this tab, restore it or restore all your crashed tabs." and label buttons 'close this tab, Restore This Tab, Restore All Crashed Tabs' and able to access the browser and successfully navigated to other pages/sites using same tab.

Hello Ametluka, Thanks for reporting this problem. I was able to reproduce this issue in firefox latest build and latest released version. Even in safe mode I could reproduce this issue. I have attached the snapshot of crash report. Firefox Version 46.0a1 Build ID 20151221114259 Update Channel nightly User Agent Mozilla/5.0 (Windows NT 6.1; rv:46.0) Gecko/20100101 Firefox/46.0 Name Firefox Version 43.0.1 Build ID 20151216175450 Update Channel release User Agent Mozilla/5.0 (Windows NT 6.1; rv:43.0) Gecko/20100101 Firefox/43.0