Closed issue by svenper on void-packages repository

https://github.com/void-linux/void-packages/issues/12885

Description:
### System

* xuname:  
  `Void 5.2.4_1 x86_64-musl GenuineIntel notuptodate hold rrnFFFFFFFFF`
* package:  
  firefox-68.0.1_1
  firefox-esr-60.8.0_1

### Expected behavior

1. Selecting password input fields do not crash the tab.
2. `file://` URLs do not crash.

### Actual behavior

When `browser.tabs.remote.autostart` is set to `true` (the default) :
1. Selecting password input fields crash the tab.
2. `file://` URLs crash.

### Steps to reproduce the behavior

```
rm -rf /tmp/firefox-void-debug
mkdir /tmp/firefox-void-debug
gdb --args /usr/bin/firefox --profile /tmp/firefox-void-debug --no-remote --new-instance --save-recordings --private-window 'https://bug1451466.bmoattachments.org/attachment.cgi?id=8965047' 2>&1 | tee /tmp/firefox.log
```