Firefox vs Google Chrome

Run both browsers on your actual MacBook for several days, not just a benchmark page. Compare page load on your work sites, how often you hit a rendering bug, and whether your favourite keyboard shortcuts still work under macOS Tahoe. Focus on the sites you open before coffee, those habits decide whether a browser feels fast.

Watch memory with your tab habits. Open the number of tabs you normally hoard, check RAM per tab in Activity Monitor, and note how Chrome’s Memory Saver and Firefox’s tab unloading affect a busy afternoon. Your tab count is personal, test with the number you actually hoard, not a clean window.

Score privacy versus convenience honestly. Test Enhanced Tracking Protection in Strict mode against Chrome defaults, see which sites need an exception, and weigh that friction against Google account autofill and passkey sync. Privacy friction is daily, count how often you must click through a blocker exception.

Check extension continuity. Rebuild your blocker and script setup in each browser, verify uBlock Origin lists and userscripts run as expected, and confirm enterprise or school policies will not disable the add-ons you rely on. Rebuild the exact blocker lists you use, a missing filter changes the experience completely.

Measure battery and thermals. Edit a Doc while playing video in another tab for an hour on battery, record Energy Impact and fan activity, and choose the browser that stays quieter for mobile work. A quiet fan on battery tells you more than a benchmark number, test on your lap.

Test recovery and sync. Intentionally quit the browser mid-session, restore tabs, move to your phone and back, and see whether Firefox Sync or Google sync recovers your history, logins and open tabs cleanly. Sync is infrastructure, a single lost password matters more than a speed tick.

Review site compatibility for work. List three internal tools your company mandates and confirm they render and print correctly in both engines, keep a fallback browser ready if one engine is blocked by IT. Your employer may block one engine, keep both until you know which is allowed.

Audit AI surface area. Confirm you can keep Gemini features disabled in Chrome and optional AI off in Firefox, check whether AI summaries appear where you do not want them, and pick the default that respects your preference. An AI summary you did not ask for is noise, check whether you can keep the browser quiet.

Revisit after a point update. Wait for the next macOS Tahoe minor, watch how each browser auto-updates, read the release notes for engine fixes, and confirm your critical extensions still work before you fully switch. A point update can break an extension, wait a day before you call the switch done.

Answer 'Firefox or Chrome' from your top three sites, not from market share. If two of the three are Docs and an internal Chromium admin console, Chrome wins by gravity.

The 18% RAM figures in 2026 write-ups are useful as a prior, not a promise. Extensions and pinned web apps can erase the gap on either browser.