I tried to disable auto-fill and experimented with a few other settings but the only way to get rid of the negative performance impact was disabling the extension and only load it on demand. It turned out I’m not the first one to notice and there are numerous tickets raised in LastPass’s support forum. Dropping to 45.7 runs per minute with LastPass enabled. Secondly, let’s enable only LastPass and run the test again. Firstly, let’s disable all extensions to get a baseline. Let’s dig deeper and run a few Speedometer 2.0 benchmarks. LastPass extension's id matches the one from the script. It turned out to be LastPass – a password manager I’ve been using for quite a while. I jumped into chrome://extensions to check which one is causing the troubles. A local extension adds more than 0.5s to the page load. But then while working on Programming Digest newsletter over the weekend I noticed an issue coming from one of the Chrome extensions after running Lighthouse audit. Well, surfing the web is one of the more compute-intensive tasks these days so maybe it is time to buy a new machine, I thought. Although it handled most of the tasks well it became sluggish when browsing the internet. My old 2013 Macbook seemed a bit slow in the last few weeks. Newsletters LastPass slows down your browser.

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