Implementing Filesystem Storage API is also not planned, given the sandboxing concerns outlined and other platforms removing this API in the near future. There have been a number of suggestions on how best to approach filesystem access from a general case.
This presents a number of challenges, as it is important for users to understand the risk of the permissions they are granting to the extension. An extension with a general permission could read from or write to any content that user has privileges to access, including profile and account information for Firefox and the Operating System. Given the goals of sandboxing, the potential for misuse, and the need to ensure users can make informed decisions and maintain control over what Firefox and its components - including extensions - have access to, this approach is not something that will be considered at this time.
The isAllowedFileSchemeAccess gives read-only access to any file in the operating environment that a user has permission to access, including system files. The focus would be on explicit user actions, like dragging and dropping files, or using a file picker that the user controls exclusively. These are workflows that the user is already familiar with, provides for most of the use cases that have been articulated by developers, and meet the goals of sandboxing and user control.
This enables add-ons to read files from the filesystem. Mostly for things like configurations files uBlock Origin or data files ePub Reader. However it can't then attach content scripts to those tabs so you can't get the content of the file unless you check "Allow file system access".
Can attach a content script to those tabs. It should be noted that Firefox currently implements the downloads API. This allows add-ons to write files and data to the filesystem in a consistent manner with an understandable user interface. Files are only written into the users downloads directory. Further on some operating systems files downloaded in this manner trigger OS level notifications.
The downloads API is not accessible from the content process, preserving the file system sandboxing requirements.
If you have an extension which assists in downloading large files, using the download API can be cumbersome as you might have to read the file into memory before processing it further.
By implementing a streaming API for Firefox, we hope to allow efficient processing of large downloads in Firefox. A red dot will appear on the Download arrow:. Click on the red-tagged Download arrow to open the Downloads panel. The file name will be displayed along with the warning message,. Other files covered under download protection may be potentially unwanted downloads explained in the Google Policy that may make unexpected changes to your computer.
Or, a download may not be malicious or unwanted, but simply not commonly downloaded. A yellow dot will appear on the Download arrow:. Click on the yellow-tagged Download arrow to open the Downloads panel.
The file name will be displayed with one of these warning messages:. When you see a malicious file or other types of potentially unsafe files in the Downloads panel, click on the right-facing arrow to choose what to do with the file, as shown in this example:.
You will be given more information about the type of unsafe file and the option to allow the download, open the file or remove it:. Tip: The right-click context menu includes other options for handling any potentially harmful or malicious files listed in the Downloads panel that are pending download:.
For example: Right-click Hold down the control key while you click on one of the potentially unsafe files that are pending download and select Allow Download to save the file to your computer.
You can check on past downloads at any time. Click on the Downloads button alternatively, click the Library menu button and then click Downloads to open the Downloads panel. The Downloads panel displays your three most recently downloaded files, along with their size, source and download time. In the Menu bar at the top of the screen, click Firefox and select Preferences. Click the menu button and select Options Preferences. Click the menu button and select Settings.
If you have tried the above suggestions, you can restore the default Firefox download folder settings:. To fix the problem, open Safari's Preferences and change the Save downloaded files to: setting to a valid folder such as your Desktop. Then restart Firefox. Change the folder properties and try again, or try saving in a different location.
If downloading certain file types does not work, check to make sure Firefox is not set to handle those file types differently from others. See Change what Firefox does when you click on or download a file for instructions on how to view and change how different file types are handled.
Internet security software, including firewalls , antivirus programs, anti-spyware programs, and others can block certain file downloads. Check the settings in your security software to see if there is an setting that may be blocking downloads. To diagnose whether Internet security software is causing problems, you can try temporarily disabling it, seeing if downloads work, and then re-enabling the software.
Downloading an executable file e.
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