How to Speed Up Vivaldi Browser: 6 Settings That Free RAM and CPU

If your computer feels vaguely sluggish without any obvious cause, the fastest fix is often to speed up Vivaldi browser settings rather than blaming your operating system. Vivaldi is powerful and packed with features, but dozens of open tabs, forgotten extensions and background tasks can quietly eat memory and CPU until the whole system drags.

The good news: a handful of changes, most of them in the Settings window, can make both the browser and your PC feel noticeably lighter. This guide covers six of them, in the order that usually gives the biggest payoff.

Key takeaways

• Tab hibernation is the single biggest memory saver for heavy tab users.
• Stripping back startup and background behaviour stops the browser doing work you never asked for.
• Hardware acceleration is not always better; test it both ways on your machine.
• Command-line flags can cap how many renderer processes Vivaldi spawns, helpful on 8 GB machines.
• Unused extensions and panels add up. Audit them regularly.

First, confirm the browser is the problem

Before changing anything, check where your resources are going. Open your system monitor (Task Manager on Windows, Activity Monitor on macOS, or System Monitor/htop on Linux) and sort by memory. If a long list of Vivaldi processes sits at the top, you have found your culprit.

Vivaldi, like other Chromium-based browsers, also includes its own task manager that breaks usage down by tab and extension. That view tells you whether one heavy site or a pile of small things is to blame.

1. Turn on tab hibernation

Many people keep tabs open as a reminder list: half-read articles, documentation, a video for later. Each one keeps using memory even when you are not looking at it.

Vivaldi can put those tabs to sleep. To hibernate one manually, right-click it and choose Hibernate Tab. To make it automatic:

1. Open Settings (Ctrl + F12 on Windows and Linux).
2. Go to Tabs and find the Tab Features section.
3. Enable Tab Hibernation so background tabs are unloaded.

The only trade-off is that a hibernated tab reloads when you click it, typically within a second or so. For most people, that is far better than a system that crawls. You can read more about how it works in the official Vivaldi Help pages.

2. Cut unnecessary startup and background work

Browsers try to anticipate what you will do next, preloading pages and keeping services running just in case. When those guesses are wrong, you still pay for them in CPU cycles and memory.

Head to Settings → General → Startup and turn off anything you do not need, such as reopening a huge previous session every time. Also review options that keep the browser active in the background after you close it. The effect is less a dramatic speed boost and more the removal of invisible work, which makes the rest of your system feel calmer.

3. Test hardware acceleration both ways

Hardware acceleration hands graphics work to your GPU. On most modern machines it helps, especially with video. On some setups, though, particular drivers or older GPUs can cause stutters, flicker or random CPU spikes.

The toggle lives under Settings → Webpages as Use Hardware Acceleration. Treat it as an experiment:

1. Note how the browser behaves for a day with your current setting.
2. Flip the toggle, restart Vivaldi and use it normally for another day.
3. Keep whichever setting felt smoother under your real workload.

A common pattern is that video playback is best with acceleration on, while overall stability under heavy multitasking can improve with it off. Your hardware decides, so do not assume the default is right.

4. Limit how many processes Vivaldi launches

Chromium browsers isolate tabs and extensions in separate processes for security and stability. That design is sensible, but it means a busy session can easily run 20 or more processes, each with its own overhead.

You can rein this in with launch flags:

vivaldi --process-per-site --renderer-process-limit=4

• --process-per-site groups tabs from the same site into one process.
• --renderer-process-limit=4 caps the number of renderer processes.

On Linux, add the flags to the Exec line of Vivaldi's desktop launcher or start it from a terminal. On Windows, you can append them to the Target field of a shortcut. The list of Chromium command-line switches explains these and other options.

This tweak shines on computers with 8 GB of RAM or less, where fewer processes can mean less fan noise and fewer slowdowns. Be aware of the downside: sharing processes weakens isolation, so one misbehaving page can affect others, and some users notice minor jitter in side panels. Undo it if you see problems.

5. Audit your extensions

Extensions are often the hidden cost. Each one may run scripts on every page you open, and they accumulate quietly over months.

1. Type vivaldi://extensions in the address bar.
2. For each extension, ask whether you used it in the past month.
3. Remove anything you did not. Disable rather than delete if you are unsure.

Vivaldi already includes a built-in ad and tracker blocker, so a separate blocking extension may be duplicating work. Pages often load and scroll more smoothly after a clean-out.

6. Trim panels, animations and extras

Vivaldi's feature set, including mail, calendar, feeds, notes and a flexible interface, is exactly why many people choose it. It is also why the browser can feel heavy when everything is switched on.

• Settings → Appearance: turn off animations you do not care about.
• Settings → Panels: remove panels you never open.
• Disable background features, such as built-in mail or feed checking, if you use other apps for those jobs.

The goal is not to strip Vivaldi bare; it is to keep the parts you use and switch off the rest.

Quick reference: which tweak to try first

Symptom	Best first fix	Trade-off
High RAM with many tabs	Tab hibernation	Brief reload on click
Slow launch	Startup settings	Session not restored automatically
Stutters or random spikes	Toggle hardware acceleration	Video may be less smooth
Fan noise on low-RAM PC	Process limit flags	Less tab isolation
Slow page loads	Remove extensions	Lose unused add-ons

Frequently Asked Questions

Why does Vivaldi use so much RAM?

Like other Chromium browsers, it runs separate processes for tabs, extensions and internal features. Many open tabs and extensions multiply that memory use.

Does tab hibernation lose my place on a page?

The tab stays in your tab bar and reloads when you click it. Pages with unsaved form input may lose that input, so save work before hibernating.

Should I turn off hardware acceleration in Vivaldi?

Only if it causes problems. Test both settings for a day each and keep whichever feels smoother on your hardware.

Are the process limit flags safe?

They are standard Chromium switches and easy to remove, but they reduce isolation between sites. Use them mainly on low-memory machines.

More ways to speed up Vivaldi browser performance

Once the six main tweaks are in place, a few habits keep the browser fast over the long term:

• Keep Vivaldi updated. New releases bring Chromium engine updates, security fixes and performance improvements. Check via the Vivaldi menu under Help.
• Use Workspaces or tab stacks. Grouping tabs by project makes it easier to close whole groups when a task is done instead of letting them pile up.
• Clear old site data occasionally. A bloated cache rarely causes slowness on its own, but clearing it can fix pages that misbehave after a site update.
• Restart the browser now and then. Long-running sessions can accumulate memory. A quick restart, with hibernation on, brings usage back to a clean baseline.
• Check your system too. If Vivaldi is lean and the PC is still slow, look at startup apps, low disk space or background updates. Our Windows guides cover those fixes.

None of these steps takes more than a minute, and together they stop the gradual slowdown that makes a fast browser feel old after a few months.

Final thoughts

You rarely need a new browser or a fresh OS install to fix a sluggish PC. To speed up Vivaldi browser performance, start with tab hibernation and an extension audit, then experiment with hardware acceleration and process limits if you need more. Grab the latest version from vivaldi.com, and find more tips in our how-to guides.