Sticky Notes That Stay on Web Pages Even After You Close the Tab

The obvious way to add a note to a webpage is to use the browser's DevTools
console or the address bar as a scratch pad. These work in the moment but
disappear the second you navigate away. For notes to be genuinely useful as
a research tool, they need to survive tab closes, browser restarts, and
coming back to the same URL days later.

Why most note approaches don't persist

JavaScript executed in the browser console — including scripts that add
DOM elements — exists in memory only. It's wiped when the page navigates
or the tab is closed. There's no built-in browser mechanism to inject
content into a page persistently.

Browser extensions can persist content across sessions because they run in a
privileged context with access to Chrome's storage APIs. This is what
allows Sticky Notes Anywhere to save notes that survive tab closes.

How Sticky Notes Anywhere persists notes

• When you create a note on a page, the extension stores:
• The URL (for matching)
• The note text content
• The position on the page (x/y percentage coordinates, so notes
• reposition correctly even if the viewport changes)
• The note color and size
• The creation timestamp

This data is saved in Chrome's chrome.storage.local API, which persists
across browser restarts. When you navigate to a URL that has stored notes,
the extension's content script reads the stored notes for that URL and
renders them on the page.

URL matching is based on the full URL by default. So a note on
https://docs.example.com/api/v2/auth#oauth is different from a note on
https://docs.example.com/api/v2/auth. You can switch to domain-level
matching in settings if you want notes on any page of a domain to appear
on all pages of that domain — useful for wiki-style sites where page
URLs change but you want site-wide notes.

Syncing across machines

Chrome's local storage (used by default) doesn't sync. If you use two
machines, notes on your work laptop don't appear on your home machine.

To sync notes:
1. Open Sticky Notes Anywhere settings
2. Switch storage from Local to Sync
3. Notes will be stored in Chrome's sync storage and appear on any
Chrome installation signed into the same Google account

Chrome sync storage has a 100KB limit per extension, which is approximately
500-1000 average-length sticky notes. If you're a heavy user, you'll want
to periodically export and archive older notes.

For teams sharing notes

Note sharing across users isn't a feature of Sticky Notes Anywhere —
notes are per-user, per-browser-profile. For shared annotation layers
(leaving notes for teammates to see), Hypothesis is better suited.

For personal knowledge management — notes visible only to you — the local
or synced storage approach in Sticky Notes Anywhere is the right level
of complexity. No accounts required, no server infrastructure, notes
stored in your browser's own managed storage.

What happens when you clear browser data

Chrome's Clear Browsing Data dialog has an option to clear extension
storage data. If you check this, Sticky Notes Anywhere's notes will
be deleted along with everything else.

Before clearing browser data, export your notes from the extension panel
if you want to preserve them. The export is a plain JSON file you can
store anywhere and re-import later via the extension's import feature.

This is also a reason to consider enabling Chrome Sync storage rather
than local storage — synced notes are stored in Google's servers and
survive a local data clear as long as you're signed into the same
Google account.

Note collisions with page updates

When a site updates its layout and elements shift positions, notes that
were positioned relative to specific content can appear in the wrong place.
Sticky Notes Anywhere positions notes using x/y percentage coordinates
of the viewport, which means a note positioned at 40% down the page stays
at 40% even if the page content has changed around it.

For notes that need to stay adjacent to specific content (like a warning
next to a specific code sample), use descriptive note text that makes it
clear which section the note refers to, even if the visual alignment drifts.

When to delete old notes

Persistence is only valuable when the notes remain relevant. A note
from 18 months ago saying check if this API is still available is just
noise once you've verified it. Periodically review your notes panel and
delete notes that are no longer actionable.

A good review cadence is once per quarter — open the notes panel, sort
by date, and delete anything older than 6 months that you haven't referenced
recently. The most useful notes are often the most recently added, while
very old notes are either incorporated into your working knowledge or no
longer relevant. Keeping the list curated means you'll actually look at
your notes rather than ignoring the panel because it's cluttered.