Firefox 53: exclusive content process for local files


Mozilla enabled a new safety feature in Firefox 53 not long ago that moves area file obtain to a new content material course of action in the browser.

Firefox’s new multi-course of action architecture Electrolysis is generating massive leaps. Mozilla began to roll out the new architecture in Firefox 48 Secure. When the roll out is nevertheless on likely, Mozilla is by now preparing forward in Firefox Nightly, the cutting edge improvement variation of the world wide web browser.

The steady versions of Firefox that have the multi-course of action architecture enabled by default use a person content material course of action only at the moment.

This indicates that the browser is using two processes: a person content material and a person for the browser main. Buyers who use NPAPI plugins may well see a third container for plugin content material.

Firefox 53: Written content Method for area file obtain

Firefox Nightly on best of that employs a course of action for GPU responsibilities driven by the browser’s new Quantum Compositor know-how.

Designs are underway to allow a 2nd content material course of action in Nightly for instance.

The advancement in Firefox 53 Nightly provides another new content material course of action to Firefox that is only created when area documents are accessed.

Any ask for to obtain area documents using the file:// protocol employs an unique course of action for that ask for commencing in Firefox 53 furnished that the multi-course of action architecture is enabled.

The principal cause for executing so is safety. Mozilla notes that transferring area file requests to their very own course of action would block compromised Firefox processes from accessing area documents.

The new area file obtain content material course of action has only read through obtain on the program Firefox is operate on on best of that.

If we only have file:// URLs processed is a different content material course of action, then a compromised regular content material course of action would not be capable to use them to read through documents.

The file:// URL content material course of action, would have read through only permissions.

The new safety feature is by now enabled on Firefox 53 Nightly. It is not very clear nevertheless if it will land in Firefox 53 Secure.

The new feature is controlled by a a Boolean choice.

  1. Kind about:config in the Firefox tackle bar and hit the Enter-vital afterwards.
  2. Affirm that you will be mindful.
  3. Look for for browser.tabs.distant.separateFileUriProcess.

Set the choice to legitimate (default) to allow the new content material course of action for area file obtain, or established it to phony to disable it.

You can check out the Bugzilla@Mozilla listing to read through up on the improvement of the feature. (by means of Sören Hentzschel)

Closing Terms

Transferring file obtain processes to their very own content material course of action will make sense from a safety issue of see. Considering that this course of action is only launched when file:// requests are made, and killed when the ask for conclude, it should really have very little to no impression on the browser from a efficiency issue of see.

Now You: Do you operate a browser with multi-course of action architecture?

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The write-up Firefox 53: unique content material course of action for area documents appeared to start with on gHacks Technological innovation Information.