Why Is Opera Using So Much Memory? | What Drives The Spike

Opera often feels “too heavy” when the number in Task Manager keeps climbing even after you close a few tabs. That can feel odd, but it is not always a bug. Modern browsers split work across many processes, and that design uses more memory than old single-process browsers.

Opera is built on Chromium, so it inherits the same process model used by many other browsers. A single browsing session can include a browser process, one or more renderer processes for tabs, GPU work, extension processes, audio or video helpers, and extra site processes added for security. Chromium’s multi-process architecture and site isolation design are a big part of why memory use rises fast when you have many tabs open.

Why Is Opera Using So Much Memory? Common Causes

The biggest cause is simple: each tab is not “just a tab” anymore. One page can load ads, scripts, video players, chat widgets, fonts, trackers, and cross-site frames. That stack can turn one page into several active chunks of work.

Then there are extensions. A coupon tool, password manager, AI helper, ad blocker, translator, and screenshot tool may all stay awake across many pages. Each one adds background work and extra memory overhead. One bad extension can also keep climbing until you restart the browser.

Video and web apps push things even harder. A live stream, Google Docs, Slack, Canva, or a busy webmail tab can sit in memory for hours. If you keep those tabs pinned, Opera may look bloated when the real story is that one or two heavy pages never stopped working.

Why More RAM Use Is Not Always Bad

Browsers try to stay responsive. If you revisit a tab and it opens instantly, that speed often comes from keeping data ready in memory. So a high number is not bad on its own. Trouble starts when memory keeps rising without settling, the browser gets choppy, or Windows begins paging hard to disk.

That is where system memory matters too. Microsoft explains that the page file extends committed memory when physical RAM runs short. When your PC leans on the page file too much, the whole machine can feel slow even if Opera itself has not crashed. Microsoft’s note on the Windows page file helps explain why a browser can feel worse on an 8 GB machine than on a 16 GB or 32 GB machine with the same tabs open.

What Usually Pushes Opera Over The Edge

Open-tab count still matters. Fifty light tabs are often fine. Ten heavy tabs with live dashboards, auto-refresh feeds, web video, and shopping pages packed with scripts can use more memory than fifty simple text pages.

Session length matters too. If you rarely restart Opera, cached data and long-running tabs can pile up. That does not always mean a leak, but it can look like one from the outside.

Opera’s own features can also change the picture. Built-in tools are handy, but each active tool still adds work. Opera does pause inactive tabs with Tab Snoozing, and it also cuts background activity with Battery Saver on laptops, as shown in Opera Help’s notes on Tab Snoozing and Battery Saver. Even so, sleeping tabs are not the same as fully closed tabs, and a tab can wake back up when a site asks for it.

Memory Trigger	What It Does	What To Try
Many open tabs	Each tab may run its own renderer and keep cached page data ready	Close stale tabs, group work by window, restart at the end of the day
Heavy web apps	Mail, chat, docs, dashboards, and maps keep scripts active for hours	Keep only the live app you need open, reload stuck tabs
Streaming video	Video decoding, buffering, and graphics work add RAM pressure	Close finished streams and avoid multiple live players at once
Extensions	Background scripts and injected page tools add steady overhead	Disable extras one by one and keep only the few you use weekly
Cross-site frames	Embedded content can create extra site processes for safety	Trim social widgets and tab-heavy sites when memory spikes
Long sessions	Hours or days of browsing can leave many active states in memory	Fully quit Opera now and then instead of keeping one endless session
Low system RAM	Windows starts paging sooner, so Opera feels heavier than it is	Reduce tab count, close other apps, keep page file system-managed
Bad site behavior	A broken tab can keep growing after ads or scripts hang	Find the bad tab, reload it, or block the site from auto-playing

How To Tell Whether It Is Opera Or One Bad Tab

Start with the pattern. If memory jumps only when a certain site is open, the site is the lead suspect. If memory rises even on a blank start page, the issue may be an extension, damaged profile data, or another app hooking into the browser.

Next, test with a clean pass. Close Opera fully, reopen it, and browse with only five tabs. Then add your usual tools back in layers: mail, music, chat, work docs, video, shopping, social, and extensions. When the spike shows up, you have a strong clue.

Red Flags That Suggest A Real Problem

• Memory keeps rising on one tab even when the page is idle.
• Opera stays heavy after you close the tab that caused the spike.
• The browser stutters, then the whole PC starts slowing down.
• One extension makes usage jump across many sites.
• A fresh restart fixes the issue for a while, then the same pattern returns.

Those signs point to a misbehaving page, a troubled extension, or profile clutter more than “Opera is bad.” In practice, browser memory issues are often one-layer problems hiding inside a big number.

Best Ways To Reduce Opera Memory Use

The fastest win is to trim tabs with intent. Keep active work in one window. Park reference tabs in bookmarks or a read-later tool instead of leaving everything open. If you must keep many tabs, close the ones with live video, auto-refresh feeds, and heavy dashboards first.

Then strip extensions hard. Most people run more add-ons than they need. Disable everything you can for one day. Add back only the tools that save you real time every week. That one step fixes a lot of “browser memory” complaints.

Also restart Opera on purpose. A full quit is different from just closing one window on some setups. End the session cleanly, reopen, and watch whether memory settles at a lower baseline.

Small Settings That Can Help

1. Leave Tab Snoozing on so inactive tabs pause instead of staying hot.
2. Use Battery Saver on laptops when you do not need every background task running.
3. Cut pinned tabs to the few you truly need all day.
4. Turn off or remove side tools you never touch.
5. Update Opera so you are not chasing a bug already fixed in a newer build.

Symptom	Likely Source	First Fix
Big jump after opening video	Streaming tab or GPU load	Close extra video tabs and reload the player
Slow PC with many tabs	Low RAM and page-file pressure	Close other apps and reduce active tabs
Usage rises all day	Long session or bad extension	Restart Opera and test with extensions off
One site makes usage explode	Script-heavy or broken page	Reload, block autoplay, or avoid that site in long sessions
High idle usage on startup	Too many pinned tabs or background tools	Trim startup tabs and disable side features

When You Should Worry

You should worry when Opera keeps eating memory after tabs are closed, crashes often, or drags the whole computer down every day. At that point, the issue has moved from “normal browser overhead” to “something is wrong.”

Try a fresh profile, test with all extensions off, and compare with another Chromium browser using the same handful of sites. If only Opera misbehaves in that clean test, you have a stronger case that the browser build or profile data is the source.

What The Big Number Usually Means

Most of the time, Opera is using so much memory because modern browsing is heavy by design. Security isolation, separate site processes, cached tab state, media playback, and extensions all pile onto the total. The fix is rarely one magic switch. It is usually a mix of fewer live tabs, fewer extensions, shorter sessions, and a clean restart rhythm.

If you want the plain answer, start with the tabs and add-ons you can live without. That gets the biggest drop the fastest. Then watch for one repeat offender. In many cases, the browser is not the whole problem. One noisy tab is.