Available A maintenance release of Firefox 125.0.2, which disables the feature introduced in Firefox 125 to block downloads of files from untrusted URLs. In some situations, the specified functionality brought to downloading other files instead of the requested ones (for example, when the “dom.block_download_insecure” setting was enabled, an attempt to download a CSV file resulted in downloading a file with the HTML text of the page). The blocking mode for dangerous downloads is planned to be finalized and reactivated in one of the next releases.
The release note also marked another extraordinary one problem, which is planned to be fixed in the next Firefox 125.0.3 update, scheduled for April 30. The essence of the problem is that after upgrading to Firefox 125, some users periodically began spontaneously opening new tabs with a URL “in the address bar. The effect appeared only on the Windows platform. Analysis of the situation showed that tabs appear when trying to launch another copy of Firefox from the command line line when Firefox is already running. Users who encounter this problem, if they have not launched new copies of Firefox themselves, are advised to scan their systems with antivirus software, as such activity may be the result of malware.
Advertisement
The appearance of the tab with the address ” is caused by mistake in the “Application Launch Prefetcher” handler. In the Firefox 125 branch, when launching an additional process, the nsWinRemoteClient::SendCommandLine method is used with the addition of the “/prefetch:1” option to the command line, which is converted to “-prefetch 1” during parameter parsing. In the future, the “-prefetch” parameter is ignored, and the remaining one is perceived as the URL to open (equivalent to running “firefox.exe 1”), which leads to an attempt to open the site “.
Thanks for reading: