I saved my firefox profile (on a 32-bit windows 7 machine; firefox was fully up to date) without firefox running, in a ZIP file (the letter number combination followed by dot followed by default), then copied the ZIP file to the new machine (windows 10 64-bit), unzipped it (so I had the same file name as from the old machine), then copied this folder into position at
I then started firefox on the new machine, went to about:profiles, created new profile, selected the folder (which was present at this step), then completed the procedure and started a new firefox with the new profile (the option given in about:profiles).
With my imported profile active, I don't see any of my bookmarks (I've not logged into mozilla firefox sync, as I wish to "pick up where I left off"), and I don't believe any of my passwords are active, as I tried a site for which I have a password normally stored, and it behaved as if I am a new visitor.
As an experiment, I tried deleting ./cache2/* and renaming ./cache2/index (it was about half megabyte) to ./cache2/index.old (I can easily re-install the profile from the ZIP archive), then restarted firefox with the profile selected, and firefox still ignores the contents of the profile.
It seems that a profile export-and-import cycle is very important to "get right" and at this stage I'm certain I'm not alone in this situation (and my export was happening from a same-version of firefox, as that instance was kept up to date.) Without an "official" export/import method, I took the approach I did as my best-guess as to the correct procedure, given a machine failing in real time.
I imagine that those "32-bit" captions refer to the OS and not FF, but then shouldn't I get an error that I'm installing the wrong FF for the OS, instead of being silently switched to the 64-bit FF? Also, I see no link to the 32-bit FF download. Does it mean that on a 64-bit Windows the only option is to install 64-bit FF?
If you are using a 32-bit Firefox and then you download and install a 64-bit Firefox, by default you will end up with two versions of Firefox installed. (But note that if you let the 64-bit Firefox installer add shortcuts to the desktop and/or taskbar, these shortcuts will replace any existing shortcuts to 32-bit Firefox.)
You have the 64-bit version of Firefox, where only Silverlight and Flash Plugins are 'whitelisted'. If you need Java you need to install the 32-bit version of Firefox. You can have both the 64-bit and 32-bit versions installed, but you'll need to do a "custom" installation (on the first screen of the installer routine) and select or create a uniquely named folder - like maybe Firefox 32, otherwise the 32-bit installer may overwrite your 64-bit Firefox installation.
Mozilla Firefox is a fast, full-featured web browser that's easy to use. It has lots of great features including popup-blocking, tabbed-browsing, integrated search, improved privacy features, automatic updating and more. Plus, thanks to the PortableApps.com launcher bundled in the Mozilla Firefox, Portable Edition, it leaves no personal information behind on the machine you run it on, so you can take your favorite browser along with all your favorite bookmarks and extensions with you wherever you go. Firefox Portable is a dual-mode 32-bit and 64-bit app, ensuring Firefox runs as fast as possible on every PC.
Firefox 53 was released on April 19, 2017. Starting with Firefox 53, Microsoft Windows support is exclusively for Windows 7 and above. Other major changes included improved graphics stability for Windows users with the addition of compositor process separation, the addition of light and dark "compact" themes based on the themes included with Firefox Developer Edition, the removal of support for 32-bit macOS and Linux for processors older than the Pentium 4 and Opteron processors, a new visual design for audio and video controls, support for WebM video with alpha compositing, which allows playing videos with transparent backgrounds, and support for displaying estimated reading time for pages in Reader Mode.[131]
Firefox 66 was released on March 19, 2019. Among the many additions and changes were: Prevention of websites from automatically playing sound, smoother scrolling (both), an improved search experience and performance and better user experience for extensions, the addition of basic support for macOS Touch Bar and of support for Windows Hello on Windows 10, along with the enabling of AV1 support on 32-bit Windows and macOS.[151]
Firefox 106 was released on October 18, 2022. Among the many additions and removals were: the possibility to edit PDFs: including writing text, drawing, and adding signatures, the ability to become the default PDF application on Windows systems on setting Firefox as the default browser, the ability to pin the Windows taskbar on Windows 10 and 11 for simpler access, the redesign of private windows to increase the feeling of privacy, swipe-to-navigate (two fingers on a touchpad swiped left or right to perform history back or forward) for Linux users on Wayland, Text Recognition in images for users of macOS 10.15 and higher, the addition of "Firefox View", the introduction of 18 new Colorways with the launch of "Independent Voices" collection, major upgrade to WebRTC capabilities, and wallpapers for the "Independent Voices" collection.[217]
Firefox 113 was released on May 9, 2023. Major changes included enhanced Picture-in-Picture; private windows protecting users even better by blocking third-party cookies and storage of content trackers; the inclusion of special characters in passwords generated by the browser; support for AV1 Image Format files containing animations (AVIS), improving support for AVIF images across the web; a tighter Windows GPU sandbox; and the availability of the browser in the Tajik (tg) language.[226][227]
Firefox 118 was released on September 26, 2023. Major changes included the introduction of automated translation of web content, courtesy of the EU-funded Project Bergamot; the use of the FDLIBM math library on all systems to improve anonymity with Fingerprint Protection via web audio in the browser; the restriction of visibility of website fonts to system fonts and language pack fonts to mitigate font fingerprinting in Private Browsing windows; the availability of Video Effects and background blur on Google Meet; the ability for U.S. Firefox Suggest users to see browser add-on suggestions right in the address bar based on their keywords; support for CSS math functions round, mod, rem, pow, sqrt, hypot, log, exp, abs, and sign; OpaqueResponseBlocking enabled by default (desktop); the availability of printing page content from the browser or share menu; the opening of pinned user shortcuts in an existing tab if it already has the same URL; and the clearing of site data being moved from "Browsing history and site data" to the "Cookies and site data" menu item (Android).[237][238]
Firefox 121 was released on December 19, 2023. Major changes included a prompt for Windows users to install the Microsoft AV1 Video Extension to enable hardware decoding support for the AV1 video codec from about:support if not already installed; support for Voice Control commands on macOS systems; a default to the Wayland compositor when available instead of XWayland for Linux users; the ability to force links to always be underlined, which can be enabled in the Browsing section of the Settings menu; the floating button in the PDF viewer to simplify deleting drawings, text, and images added in PDFs; the Firefox Debugger including a new feature: an option to disable the debugger; keyword on the current page; the unification of the focus indicator across the toolbox, which is now larger with improved contrast, featuring a white box-shadow for enhanced visibility on blue backgrounds; added support for the :has() selector, which authors to match an element that has, or "anchors", at least one element matching its relative selector; added support for the hanging and each-line keywords for the text-indent CSS property, offering more convenient paragraph layout options for styles such as bibliographies, poetry, etc.; added support for the balance keyword for the text-wrap CSS property, which can improve the appearance of short multi-line text blocks such as long headings or captions by harmonizing the line lengths; added support for the lazy loading iframes, which are only loaded when visible, so non-critical iframes can load later when needed to speed up initial page loads, reduce initial network usage, etc.; added support for tail call elimination in WebAssembly language to improve support for functional languages (desktop); expanded extension capabilities by popular demand, adding new support for over 400 more extensions; the ability for private windows to protect users even better by blocking third-party cookies and storage of content trackers; Enhanced Tracking Protection custom mode including blocking of social trackers by default; a fix for a crash when copying to the clipboard; a fix for a crash when the fullscreen notification was encountered; a fix for rendering issues and crashes on Google Pixel 8 and Samsung Galaxy S22 devices (Android); and various security fixes (both).[243][244]
The official releases of Firefox for macOS are universal builds that include both 32-bit and 64-bit versions of the browser in one package, and have been this way since Firefox 4. A typical browsing session uses a combination of the 64-bit browser process and a 32-bit plugin process, because some popular plugins still are 32-bit.[251] As of April 19, 2017, Firefox 53 has dropped support for 32-bit macOS.[252]
The 32-bit and 64-bit versions of Windows can be used to run 32-bit Firefox.[citation needed] In late 2012, Mozilla announced 64-bit Windows builds would be stopped[253] but later reversed the decision.[254] As of April 2015[update], 64-bit Windows builds are available as 38.0 Beta[255] and newer. 64-bit builds for Windows are officially supported as of November 2015 with the release of Firefox 42.
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