Firefox update issue "XML parsing error undefined entity" Solved

Question

Hello, My computer crashed in the middle of the automatic Firefox update. Upon restart + trying to open Firefox: "XML parsing error undefined entity". Not finding a solution on the forums, I uninstalled Firefox thinking I would reinstall it later. The executable download is not occurring. I still haven't been able to find a solution on the forums. If there is a remedy to my problem, I greatly appreciate it if you could let me know   Configuration: Windows / Edge 91.0.864.48

MPMP10 · Answer

Hello, https://www.commentcamarche.net/telecharger/utilitaires/19335-resetbrowser/  -- The technocrats, if we gave them the Sahara, in 5 years, they would have to buy sand elsewhere. Coluche.

pistouri · Answer

Hello,  1- Delete the installation directory of Firefox. Display hidden files and folders Delete the Mozilla folder in these directories if you see it: -►C:\users\your username\AppData\Roaming -► C:\users\your username\AppData\Local -► C:\Program Files (X86) -► C:\Programs  Delete Firefox shortcuts on the desktop.  Hide hidden files, folders, and drives.  Reinstall Firefox 32 or 64 bit according to your version  2- Create a new profile Or use the profile manager Do not delete the old profile if present.  Info Try to launch Firefox in safe mode using the shift key The tutorial  And check that in the task manager under the Processes tab, there is no instance of Firefox open; if so, right-click on Firefox and then End Task.  A+

Basseur · Answer

Thank you all, In fact, I was searching in vain for an install.exe in the Downloads folder. I just had to click on "Open file" in the error notification window of Edge and the installation started. Thanks again for your support Good evening

pistouri · Answer

Message 9  Actually, I was desperately looking for an install.exe in the Downloads folder.I just had to click on "Open a file" in the Edge error message window and the installation started.   Edge blocks .exe file downloads by default Example when downloading Firefox from the CCM practical guide   And if you click on the 3 little dots on the Download icon next to the address bar and then Open the Downloads page   You find the message --► This type of file could harm your computer   And if you close the Edge browser you cannot continue the download, only close the browser.     To download .exe or other files with Edge Click on the Windows security icon for more direct access. Or Settings ►Updates and security►Windows Security (left menu) ►App and browser control  Click on the line -►Security-based protection settings    Highlight in blue the SmartScreen box for Microsoft Edge And disable -►Block potentially unwanted applications And click on -►Ignore   Back in Edge (you can close it and reopen it) but the effect is immediate. Download the file of your choice Firefox in this example And a dialog box appears -► Open or Save   If you click on Open then open this file it allows you to run the file directly.   And you click on Save The explorer opens. You choose the Downloads folder or to find it faster, the Desktop. By default, it is in the Downloads folder of the explorer.   Basseur, I advise you not to just back up your newly installed Firefox but to back up all your browsers with Hekasoft Backup & Restore which you will keep on an external drive, a USB key for example. The backup will restore your browsers identically, useful if the PC crashes or the browser itself does, to be done as often as possible especially if you add bookmarks or folders and extensions.  A+

pistouri · Answer

Hello Basseur,  Something is very wrong with Edge Chromium when downloading, especially the download of Firefox, though it applies to other files to a lesser extent. I was intrigued, as I use IDM to download or save files with Edge Chromium without any issues, so I disabled the IDM extension to check what was wrong, and the culprit was quickly identified, namely the SmartScreen filter.  Here is an article published on May 9, 2021 that I summarized and translated:  Microsoft Edge blocks and flags the Firefox installer as harmful  Some users reported that Microsoft Edge blocked all versions of the Firefox Installer when attempting to download.In case you didn't know:Chrome uses safe browsing technology to protect users against malicious websites and files.Microsoft Edge uses SmartScreen for the same purpose.Both browser providers utilize their technologies on Google and Bing search engines to warn users against malware. The Microsoft Defender SmartScreen protection in Edge Microsoft Defender SmartScreen in Edge scans files downloaded by users against a known list of files.If it encounters a little-known application or application installer that is commonly downloaded by users, it blocks the file download and displays a warning.The protection is enabled by default in Settings > Privacy, search and services > “Microsoft Defender SmartScreen” Edge even offers an optional feature to block potentially unwanted program downloads.You can enable it by turning on the "Block potentially unwanted apps" setting. Microsoft Edge blocks the Firefox installerRegarding the article, in the case of Firefox, according to Reddit discussion threads, several users have confirmed that Edge warned them when they downloaded Firefox, stating that the installer could harm their device.You can see the warning displayed by Edge from the Downloads Flyout (located in the download icon)“Firefox installer.exe was blocked because it might harm your device”.Some affected users reported successfully downloading and installing Firefox after disabling Microsoft Defender SmartScreen.We are unable to reproduce this for any version of Firefox. The false positive may have been fixed server-side by Microsoft.The irony is that disabling the Defender SmartScreen setting caused Edge to incorrectly flag the Firefox download as dangerous.We think this is normal. Chrome will do the same when you disable safe browsing. If you are experiencing the issue right now, it is not recommended or advisable to disable SmartScreen; instead, use another browser to download Firefox or any other application you have issues downloading from Edge.As of today, the blocking of the Firefox download on Edge may have been lifted.In fact, once Bing flagged the popular VLC player as dangerous in the past, the red flag was removed after a short period.What are your thoughts on this?  Source  Response 5 resolved the issue --►"XML parsing error undefined entity" Response 10 resolved the Firefox download issue with Edge Chromium, which is the new name for Edge in the latest versions of Windows 10.  With another third-party antivirus, you apparently wouldn’t have had the problem, although that remains to be verified.  Note: It is worth noting that in the security settings of Edge Chromium, it is possible to disable the SmartScreen filter and the potentially unwanted applications.  The procedure Open Edge Click on the three dots located at the top right and then on --►Settings In the left menu, click on --►Privacy, search and services Or for quicker access, remove everything in the address bar and copy/paste --► edge://settings/privacy Then hit the enter key or right-click and paste, then --► go to edge://settings/privacy Scroll down to the section --►Services From there, you can disable the 2 highlighted blue lines, namely: ==► Microsoft Defender SmartScreen ==► Block potentially unwanted apps    The problem is that the security center detects an anomaly and requests activating app and browser control.   Just click on --►Ignore   The security center dashboard is back in operation without any notifications.   We will see in the next update, scheduled for the second half of 2021, whether Edge and Windows Defender antivirus (Security Center) will have any improvements or changes.It is worth noting that the upgrade (expected in October) will be called Windows 11 (initially called Windows 10.5) with a new graphical interface, centered taskbar icons, rounded window corners, and many other new features, but we are not there yet.  A+

Firefox update issue "XML parsing error undefined entity"

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