Your browser: tabs, URLs, history, bookmarks

1. The promise

You'll know how to use your browser professionally — keyboard-driven, with a clean tab and bookmark discipline. You'll know what a URL is made of, how to search your history, and what a profile is for.

2. The mental model

The browser is your developer dashboard.

• Tabs are your working set — what you have in your hands right now.
• The address bar is a command line — it runs searches, opens URLs, does math, and opens browser internal pages.
• History and bookmarks are your filing system — what you saw and what you want to remember.

The vocabulary, said properly:

• A URL (uniform resource locator) is the address of a web resource. We unpack URLs properly in Ch 3.
• A tab is one open page in a browser window.
• A profile is a separate browser identity with its own bookmarks, history, and cookies. Work and personal are the two most common.
• An incognito or private window is a browser window that doesn't save history or cookies after you close it.

3. You do it, with me

We'll do this in Chrome. Edge works identically. Firefox and Safari have the same features under similar names.

Step 1. The address bar is a command line.

Press Cmd+L (macOS) or Ctrl+L (Windows). The cursor jumps to the address bar with the current URL selected.

Try four things:

1. Type a search query and press Enter. You get a Google search.
2. Type https://news.ycombinator.com and press Enter. You get the site.
3. Type chrome://settings/ and press Enter. You get Chrome's settings page. (Internal pages live at chrome://... URLs.)

(SCREENSHOT: Chrome address bar with chrome://settings/ typed — full window — before pressing Enter)

4. Type 25*47 (no spaces) and watch the suggestion dropdown. Chrome answers the math inline.

(SCREENSHOT: Chrome address bar with a math expression 25*47 typed — showing the inline answer dropdown — full window)

The address bar isn't just for URLs. Treat it as the place you type anything you want the browser to do.

Step 2. Anatomy of a URL. Look at https://www.example.com/path?query=value#fragment.

• https:// — the protocol (the language the browser speaks to the server).
• www.example.com — the host (the server's name).
• /path — the path to a specific page on that server.
• ?query=value — the query string (extra data sent to the server).
• #fragment — the fragment (a position within the page, like a section heading).

We dig into URLs properly in Ch 3. For now, just recognise the parts.

Step 3. Tab discipline. Tabs you keep open all day (your email, your docs, your code review tool) should be pinned. Right-click a tab -> Pin. It shrinks to just the favicon and sticks to the left.

Tabs you opened for one task should be closed when the task is done. Cmd+W / Ctrl+W. Reopen with Cmd+Shift+T / Ctrl+Shift+T if you closed by accident.

Step 4. Search your history. Press Cmd+Y (macOS) or Ctrl+H (Windows). The history page opens. Type into the search box at the top — Chrome searches every page you've visited.

(SCREENSHOT: Chrome history page — Cmd+Y / Ctrl+H — full window — search box highlighted)

This single feature saves you hours. Anything you visited in the last ninety days, you can find by typing two words you remember.

Step 5. Bookmarks. Cmd+D / Ctrl+D saves the current page. Save it into a folder.

Turn the bookmark bar on (Cmd+Shift+B / Ctrl+Shift+B) for one-click access to the bookmarks you use daily.

(SCREENSHOT: Chrome bookmark bar visible with a few folders — full window)

Open the bookmark manager with Cmd+Option+B (macOS) or Ctrl+Shift+O (Windows) when you need to reorganise.

Step 6. Profiles. Click your avatar in the top-right -> Add. Make a "Work" profile separate from your personal one. Different bookmarks, different cookies, different logged-in accounts.

(SCREENSHOT: Chrome profile picker — full window — "Add" button visible)

A separate profile is how you stay logged into your personal Gmail and your work Gmail at the same time, with no logout dance.

Step 7. Incognito. Cmd+Shift+N / Ctrl+Shift+N opens a private window. History and cookies are forgotten when you close it.

(SCREENSHOT: Chrome incognito window — recognisable dark UI — full window)

Useful when you want to test a site as a fresh visitor (no cached login).

4. What you should be seeing

A Chrome window with a few pinned tabs, the bookmark bar visible, and a second profile created. You can open history from the keyboard. You know the address bar handles search, URLs, internal pages, and math.

5. Common stumbles

• You have eighty tabs open and the browser is slow. Each tab is a process eating RAM. Close everything you're not actively using. If you might want it back, bookmark it first. Reopening from a bookmark is faster than scrolling through eighty tabs.
• You saved a bookmark and can't find it. Open the bookmark manager (Cmd+Option+B / Ctrl+Shift+O) and search. Or use Chrome's address bar — it searches bookmarks too.
• You think incognito hides you from the site. It doesn't. It hides the visit from anyone using your computer afterwards. The site still sees you. Don't confuse the two.
• Logging in everywhere makes Chrome forget your work password. Use profiles. Work profile holds work logins. Personal profile holds personal. Don't share.

6. You should know