Download Firefox Data

A Firefox profile stores all of your important data, such as your bookmarks, history, cookies, and passwords. This article explains how to copy files to a new profile, lists important files in the profile and describes what information is stored in these files.

While copying your personal data from an old Firefox profile to a new Firefox profile, it is possible that you could copy over the file that is causing the problem you are trying to get rid of! The more files you copy over, the greater the chance of this happening. It is therefore recommended that:

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Learn how to move, install or migrate Firefox to a new device. Once you enable your backup, whenever you change your phone or computer to a new device, you will be able to install Firefox without losing your data. Your bookmarks, browsing history, passwords, and open tabs will migrate with you securely.

Yes, you can choose the data you want to sync in step 2 of the wizard, by clicking the browser settings link. You can also change this later by following the steps in How do I choose what information to sync on Firefox?

When backing up your data, your history, passwords, addresses, and credit cards are included. However, we do not collect this information and it remains accessible to you alone. Here is a list of frequently asked questions regarding how we handle user data.

You can have multiple Firefox programs installed in different locations. To start the Profile Manager for a specific Firefox installation, replace firefox.exe in the above instructions with the full path to the Firefox program, enclose that line in quotes, then add a space followed by -P.

You will be taken back to the Choose User Profile window or the About Profiles page and the new profile will be listed. When you first start Firefox with the new profile, you will be prompted to sign in to your Mozilla account so that you can sync your data with the new profile (see below).

To copy all of your Firefox data and settings to another Firefox installation (for example, when you get a new computer), you can make a backup of your Firefox profile, then restore it in your new location. For instructions, see Back up and restore information in Firefox profiles.

If you have important information from an old Firefox profile, such as bookmarks, passwords, or user preferences, you can transfer that information to a new Firefox profile by copying the associated files. For instructions, see Recovering important data from an old profile. You can also switch to a previous profile to recover old profile data. See Recover user data missing after Firefox update for details.

At Mozilla, like at many other organizations, we rely on data to make product decisions. But here, unlike many other organizations, we balance our goal of collecting useful, high-quality data with our goal to give users meaningful choice and control over their own data. The Mozilla data collection program was created to ensure we achieve both goals whenever we make a change to how we collect data in our products.

In November 2017, we revised the program to make our policies clearer and easier to understand and our processes simpler and easier to follow. These changes are designed to reflect our commitment to data collection grounded in:

Data stewards come from a variety of teams within Mozilla, including data science, Firefox engineering, mobile products, Pocket, Common Voice, AMO, and Thunderbird. You are welcome to tag any steward for any collection request, without respect to the nature of your collection.

Note: The data stewards aren't responsible for showing teams how to collect data, although they might be able to provide some guidance if they have time. But the Firefox data engineering team has prepared data documentation which can help!

These guidelines are required for data collection in products with an active user base and established privacy policies under the Firefox organization, but may be applied to any Mozilla product as needed. Changes to policies themselves or the creation of a policy for a new product is out of scope of what is described here.

In some cases a data steward may escalate concerns to the Trust and Legal teams. They are the teams responsible for defining Firefox data collection policies and can field questions about internal policy and laws governing user privacy

Mozilla always strives to make data reviews public. However, there are sometimes limited sets of circumstances when we may conduct our reviews in a private bug; for example, a service is part of an agreement where the partnership is not yet public. These reviews will be made public once the actual data collection begins.

Data stewards review each request to ensure that it is documented fully and to assign the data collection to one of our 4 privacy categories as described here. tiers. The detailed steps in this process are:

As a first step, it is important that the details of the implementation, intended use, and value to users be clearly documented for future reference and efficient review. As soon as this is ready (we recommend as early as possible, before you move forward with the implementation), send an email to the data-review@mozilla.com mailing list.

In the case of a dispute about sensitive data collection and/or which mitigations are appropriate, the proposer or any reviewer should work with one of the facilitators to escalate the decision to the VP/XLT member in charge of the product (e.g., Head of Firefox, Head of Pocket). Depending on the scope and nature of the risk, there may also be cases where escalation goes beyond the immediate product owner (i.e., to the CPO or CEO). When this happens, the facilitator and escalating party:

As the title suggests, I got a new computer and brought my old firefox data folder over in hopes of recovering my old login info and stuff, add ons etc. From what googling has told me what I'm supposed to do is copy paste the old stuff into the new profile folder but that hasn't been working. Any advice on how to proceed from here?

Data URLs, URLs prefixed with the data: scheme, allow content creators to embed small files inline in documents. They were formerly known as "data URIs" until that name was retired by the WHATWG.

If the data is textual, you can embed the text (using the appropriate entities or escapes based on the enclosing document's type). Otherwise, you can specify base64 to embed base64-encoded binary data. You can find more info on MIME types here and here.

Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. By consisting only of ASCII characters, base64 strings are generally url-safe, and that's why they can be used to encode data in Data URLs.

A data URL provides a file within a file, which can potentially be very wide relative to the width of the enclosing document. As a URL, the data should be formattable with whitespace (linefeed, tab, or spaces), but there are practical issues that arise when using base64 encoding.

Browsers are not required to support any particular maximum length of data. For example, the Opera 11 browser limited URLs to 65535 characters long which limits data URLs to 65529 characters (65529 characters being the length of the encoded data, not the source, if you use the plain data:, without specifying a MIME type). Firefox version 97 and newer supports data URLs of up to 32MB (before 97 the limit was close to 256MB). Chromium objects to URLs over 512MB, and Webkit (Safari) to URLs over 2048MB.

The data portion of a data URL is opaque, so an attempt to use a query string (page-specific parameters, with the syntax ?parameter-data) with a data URL will just include the query string in the data the URL represents.

A number of security issues (for example, phishing) have been associated with data URLs, and navigating to them in the browser's top level. To mitigate such issues, top-level navigation to data: URLs is blocked in all modern browsers. See this blog post from the Mozilla Security Team for more details.

Data URLs, URLs prefixed with the data: scheme, allow content creators to embed small files inline in documents. They were formerly known as \"data URIs\" until that name was retired by the WHATWG. e24fc04721