Recommended Posts

Scrolling is done in native code in Firefox, but pages can register JS callbacks for each scroll event, so the JS event loop is intertwined with the main event loop, you can't separate them.

Edit: And that's just scrolling, there's a bunch of other things as well.

Hadn't noticed that the 'PDF Viewer' add-on had been updated recently. The new UI looks great and it loads PDFs very quickly, it's a lot better than the Adobe plug-in. One thing I would like is the ability to choose a 'hand' cursor where you can click and drag the document rather than just the text cursor.

Hadn't noticed that the 'PDF Viewer' add-on had been updated recently. The new UI looks great and it loads PDFs very quickly, it's a lot better than the Adobe plug-in. One thing I would like is the ability to choose a 'hand' cursor where you can click and drag the document rather than just the text cursor.

It still seems to be factor slower than Adobe Reader - I mean like comparing n vs n^4 slower at rendering PDFs.

Adobe Reader downloads the PDF and displays it almost instantly after downloading it.

PDF JS for some reason renders the PDF one word/line at a time which takes way longer - and it does it again when zooming.

This is completely unacceptable.

If you don't like it then just disable it, and you can keep using Acrobat.

It's not even meant to be enabled by default, the user has to do that.

All I had to do is disable Adobe Reader to enable it

So it is enabled by default as long as you don't have a PDF reader plugin.

It also seems to be very RAM heavy.

https://bugzilla.moz...g.cgi?id=715376

This will improve overall responsiveness even a lot more by suspending activity in background tabs! Not only that , it will also use lesser CPU times and Memory

Try it out : https://addons.mozil...ackground-tabs/

It's not going to suspend background tabs, it's just going to be smarter at performing work in them.

Currently it stops event handlers and such firing faster than 1 second in background tabs, but if you have multiple tabs open and they're out of sync (due to each page having it's own timer), you could get into a situation where each timer firing directly after another timer, so the browser is still constantly processing events and timers. What they eventually want is a event queue, where each timer or event in every tab is added to a global list, and every second or so it goes through and processes all queued events, allowing it to do other work for the rest of the time (page rendering, etc.)

Edit: The addon does suspend background tabs, but that's as a proof of concept.

Azure Content Hardware Acceleration in Inbound.

Applying Updates in Background landed in Nightly.

Debugger Dev Tool is coming as turned ON in Nightly.

Off the Main Threading Compositing landed for Linux in Nightly.

I went to the about window and it downloaded an update then it said "restart to install" so I clicked that and firefox's window closed and nothing happened, I then checked task manager and firefox had shot up to using 13.5GB RAM out of 16GB so my computer was sitting at 15.8GB, this was a fresh profile with no addons. I had to kill firefox.exe, this kinda surprised me! That was some huge memory leak.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Posts

    • Flameshot 14.0 Final by Razvan Serea Flameshot is a free and open-source, cross-platform tool to take screenshots with many built-in features to save you time. Using Flameshot is as simple as launching, dragging the selection box to cover the area you want to capture, making annotations as needed in on-screen and saving the shot to your computer, all with a very simple and straightforward interface. Flameshot allows users to simply upload their screenshots directly to the cloud in order to easily share it with others. You can upload your image directly to Imgur with a single click and share the URL with others. In-app screenshot editing - You can choose to add an arrow mark, highlight text, blur a section (blur or pixelate an area), add a text, draw something, add a rectangular/circular shaped border, add an incrementing counter number, and add a solid color box with Flameshot's built-in editing tools. Command-line interface (CLI) - Flameshot has several commands you can use in the terminal without launching the GUI via a command line interface. The command line interface lets you script Flameshot and use it as the subject of key binds. Flameshot 14.0 release notes: This release brings major improvements to multi-monitor support, fractional scaling support, new capture workflows, and a long list of bug fixes across all platforms. Changelog: New Multi-Monitor Capture Workflow New monitor selection screen before capture for better multi-monitor and mixed-scaling support. Option to auto-capture the monitor under the cursor (X11 & Windows). Tray menu can directly select a monitor. Linux Improvements XDG Desktop Portal is now the primary screenshot method. Added legacy X11 fallback option for minimal window managers. New D-Bus capture API for scripting and automation. Windows Enhancements Global screenshot hotkeys now supported (not limited to Print Screen). New portable mode stores settings next to the executable. Clipboard now always uses PNG format for better compatibility. CLI & Platform Updates Redesigned flameshot screen command with per-monitor capture support. Added native Nix Flake support. More compact launcher UI and improved update notifications. Major Fixes Multiple Wayland stability fixes, including KDE Plasma crash fixes. Clipboard compatibility improvements for GNOME, Wayland, X11, Windows, and macOS. Fixed D-Bus hangs, capture crashes, and HiDPI region issues. Other Changes Dropped Ubuntu 20.04 (Focal) support. Updated translations and build infrastructure. Intel macOS builds are no longer provided. [full release notes] Download: Flameshot 14.0 | 18.1 MB (Open Source) Download: Flameshot Portable | 53.0 MB Links: Flameshot Home Page | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • Helium Browser 0.13.4.1 by Razvan Serea Helium is a private, fast, and honest Chromium-based web browser — built for people, with love. It offers the best privacy by default, unbiased ad-blocking, and a clean experience free from bloat and noise. Proudly based on Ungoogled-Chromium, Helium removes Google’s clutter while keeping a fast, efficient development pipeline. With thoughtful touches like native !bangs and split view, Helium is a people-first, fully open-source browser that puts control back in your hands. Privacy, security, and control come first. Ads, trackers, and third-party cookies are blocked automatically, HTTPS is enforced everywhere, and all Chromium extensions work seamlessly — while Google can’t track your activity. Helium’s 13,000+ offline-ready !bangs let you jump straight to sites or AI tools like ChatGPT instantly. Open-source, people-first, and unbiased, Helium delivers a browsing experience that’s fast, secure, and free from noise, ads, and compromises. Helium Browser key features: Performance Fast, efficient, and lightweight — built on Chromium’s optimized engine. Energy-saving and consistent — stays fast over time without slowing down. No bloat — stripped of unnecessary components for maximum speed. Minimalist interface — compact, clean, and distraction-free. Customizable toolbar — hide elements you don’t need. Smooth and stable — no flicker, lag, or animation glitches. Comfort-focused experience — intuitive and unobtrusive. Privacy & Security Best privacy by default — blocks ads, trackers, phishing, and third-party cookies. Unbiased ad-blocking — powered by community filters and uBlock Origin. No telemetry or analytics — zero background web requests on first launch. Strict HTTPS enforcement — warns for insecure sites. Passkeys supported — modern authentication made simple. No built-in password manager or cloud sync — your data stays yours. Extension Compatibility Full Chromium extension support — including MV2 extensions. Anonymized Chrome Web Store requests — Google can’t track extension installs. Extended MV2 support — maintained for as long as possible. Smart Features Native !bangs — browse faster using 13,000+ offline-ready shortcuts. AI integration — use !chatgpt and others directly from the address bar. Offline functionality — bangs work without an Internet connection. Philosophy People-first design — open source, transparent, and community-driven. No ads, no noise, no bias — privacy and honesty over profit. Helium Browser 0.13.4.1 changelog: 0a4f1149 revision: bump to 4 (#1969) 4848de1f helium/core: enable the chromium screenshot feature (#1968) e0dec3f5 onboarding: integrate strings to i18n system (#1948) 417fa5bc i18n: fix newline parsing for onboarding 7a339b39 i18n: add foraged translations for onboarding 4f090cff i18n/generate: add handling for onboarding strings bfe48d58 i18n_apply: manually override parent grd logic for onboarding strings ab214e3c onboarding: bump in deps, wire up grdp afa6a059 helium/core: disable pdf infobar feature (#1965) eba585e7 helium/ui/vertical: fix new tab button alignment and icon size (#1964) 6ecfc9e0 helium/ui/tabs: fix horizontal tab hover background color (#1963) 3db87dc0 helium/ui/tabs: fix new tab button hover/press colors (#1962) 6bbdcc3e helium/ui: improve tab group UI in all layouts (#1961) 53deb314 helium/ui/tabs: enable tab group hover cards e93aece7 helium/ui/vertical: fix tab group appearance, prevent line overlap 629f5495 helium/ui/tabs: restore solid group header colors, enable new colors 961c962e helium/ui/tabs: move horiz tab group underline to bottom, make it thick c96deab6 merge: update to chromium 149.0.7827.155 (#1959) 36db56b4 i18n: update source.gen.json 5ce006ae patches: refresh for chromium 149.0.7827.155 b4c1ea62 merge: update ungoogled-chromium to 149.0.7827.155 4e5e8671 Update to Chromium 149.0.7827.155 08a3e7da helium/ui/layout: disable mute on collapsed vertical tabs (#1778) a0a5bbaf helium/core: simplify context menu and prevent huge widths (#1951) c4732aac devutils/i18n: add forage command (#1944) 11d16986 devutils/i18n: add an option to translate using local CLI tools (#1942) d820c3a2 i18n/prompt: tighten translation rules to prevent common errors (#1940) cf827007 Update to Chromium 149.0.7827.114 6e3d5164 Update to Chromium 149.0.7827.102 Download: Helium 64-bit | Portable 64-bit |~100.0 MB (Open Source) Download: Helium ARM64 | Portable ARM64 Links: Helium Home Page | macOS | Linux | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
  • Recent Achievements

    • Reacting Well
      BizSAR earned a badge
      Reacting Well
    • First Post
      AndreaB earned a badge
      First Post
    • Week One Done
      Huge Trailer earned a badge
      Week One Done
    • Week One Done
      Classifyskilleducation earned a badge
      Week One Done
    • One Month Later
      eurospharma62 earned a badge
      One Month Later
  • Popular Contributors

    1. 1
      +primortal
      579
    2. 2
      +Edouard
      183
    3. 3
      PsYcHoKiLLa
      75
    4. 4
      Michael Scrip
      73
    5. 5
      neufuse
      64
  • Tell a friend

    Love Neowin? Tell a friend!