Mozilla has always been known for pushing browser innovation, but its latest experiment is stirring up a different kind of conversation—one that's not entirely positive. In its recent Firefox 141.0 update, the company introduced a new AI-powered tab grouping feature designed to make managing dozens of open tabs a little less overwhelming.

he concept sounds handy: the browser can automatically organise similar tabs into groups and even generate suggested names for them. Best of all, the feature uses a locally installed AI model, meaning your browsing data never leaves your machine. Privacy win, right? Well, not everyone's convinced.

When a Convenience Becomes a CPU Hog

Shortly after the update rolled out, Reddit lit up with posts from users noticing unusual behaviour. Some reported that their CPU usage—and even power consumption—spiked dramatically when Firefox was running.

One user claimed that a mysterious process called "Inference" could shoot from a barely noticeable 0.05% CPU usage to a jaw-dropping 130% in certain situations. For anyone on a laptop, this kind of spike isn't just a performance concern—it's a battery drain nightmare.

This has led to criticism from users who argue that tab grouping is a simple enough task that doesn't need AI's heavy lifting. To them, it's just extra bloat for a problem that could be solved with a few clicks.

Mozilla Responds: "This Isn't Normal"

Mozilla's developers have already addressed the issue in a bug report, confirming that these "abnormal CPU spikes" should not happen under normal conditions. They explained that the AI tab grouping feature is still experimental and being rolled out gradually, so not every user will see it immediately.

The inference process, which handles the AI's decision-making, runs entirely on the user's machine. However, Mozilla admits it's not perfect—the system can misidentify tabs or suggest names that make little sense.

What You Can Do If You're Affected

While Mozilla works on a fix, there's a temporary solution for those experiencing slowdowns or excessive battery drain: simply turn off the AI tab grouping feature.

You can do this by heading to Firefox's settings menu and disabling the experimental AI option. For now, this is the safest way to keep your CPU cool while Mozilla smooths out the rough edges.

Final Thoughts

This isn't the first time a tech company has introduced a flashy new AI feature that doesn't quite land as intended. Mozilla's heart is in the right place—after all, tab chaos is a real problem for many of us—but rolling out experimental tools without fully ironing out performance issues can easily backfire.

If you're the type who loves trying new features, this might still be worth keeping an eye on once the bugs are squashed. But for now, disabling it might just keep your Firefox running as smoothly as you're used to.