Created attachment 8925964 [details] webext-contentscript.zip User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0 Build ID: 20171106100122 Steps to reproduce: - Install the minimalist webext extension using "Load Temporary Add-on" feature - Open a new tab and navigate to https://news.ycombinator.com/ - In the address bar of the same tab, paste "about:blank" Actual results: The tab apparently navigated to "about:blank", but the page content was not rendered blank -- the tab still shows the content of the previous URL. Expected results: The tab should have navigated to about:blank and render a blank page. This issue is 100% reproducible and occurs when the two following conditions are met: - There is a webext extension installed. - The extension declares "run_at" as "document_start". - The extension declares "match_about_blank" as "true". First reported at: https://www.reddit.com/r/firefox/comments/7bbku0/home_button_stopped_working_with_aboutblank_ff5602/dph1d23/
Correction, I meant to post a link to original reporter: https://www.reddit.com/r/firefox/comments/7bbku0/home_button_stopped_working_with_aboutblank_ff5602/
I forgot to mention that if you resize the window, the page is eventually rendered blank as you resize.
This may be the reason for several reports of this problem linked to the WebExtensions version of Adblock Plus (3.0). * https://support.mozilla.org/questions/1183233 * https://support.mozilla.org/questions/1183248 * https://support.mozilla.org/questions/1183247
Sorry, I made the mistake of not reporting with which Firefox version I reproduced the issue: this was Firefox 56. I just tried with Nightly (FF58) and I can't reproduce.
Given that it's marked as 56 and can't be reproduced in 57 or 58 (as confirmed by the ABP ticket), I suggest we close. Given 57 is coming, we can't fix 56 anyway.