How it works
Select, click, compare by size
1
Select gdp text on a webpage.
2
Click the Marketcaper icon or right-click lookup action.
3
Open country gdp, world gdp, and related gdp size entries. and compare links.
GDP extension
Country GDP browser extension
Select a country, region, or GDP entity while reading and open a Marketcaper card with latest available GDP size context and comparison links.
Examples to select
United StatesWorld GDPChinaGermanyG7
Country GDP size
World and region GDP context
Country-name focused lookup
GDP comparison links
Lookup card
Marketcaper GDP Country Size Lookup
M
GDP catalogue
United States
Country GDP, world GDP, and related GDP size entries.
Compare by sizeOpen asset
What it does
One clear lookup purpose
The GDP extension recognizes country names, country codes, and GDP entities, then opens macro-size context without returning stocks, funds, crypto, or fiat assets.
Selected text
Local first, click to send
Selected text is inspected locally for a possible GDP catalogue match. It is sent to Marketcaper only after you click the icon or use the right-click lookup action.
Permissions
Only what the feature needs
Browser permissions support selection lookup, the context menu, saved preferences, and requests to Marketcaper. They are not used for ads or background page scraping.
Privacy
No account required
The extension does not require a Marketcaper account, does not sell selected text, and does not use selected text for advertising.
Review notes
Why the extension asks for browser permissions
Extension code is bundled in the browser package. Requests to Marketcaper return lookup data, not remote executable scripts.
Content script on webpages
Needed to place the small Marketcaper icon beside selected text. The extension filters selections locally and does not read whole pages.
Context menu
Adds the right-click Marketcaper lookup action for selected text when you prefer not to use the floating icon.
Storage
Remembers your enable or disable preference for selection detection on your browser.
Active tab and scripting
Supports the right-click fallback on the current tab when the content script needs to be loaded safely.
marketcaper.com access
Used only to request a category-scoped lookup after you click the icon or use the context-menu action.
FAQ
Questions before installing
Does GDP use market cap wording?
No. GDP pages use GDP wording and comparison context, while Marketcaper keeps market cap wording for market-cap assets.
Can I compare a country GDP with a company or crypto asset?
Yes. Start from the GDP compare tool and unlock all categories when you want cross-market size comparisons.
Other catalogues