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FireShot - Full webpage screenshot tool support forum / FireShot Browser Extension / Premium Support

Firefox extension won't finish capturing

Pages: 1
Posted:  15 May 2026 05:26
Hello, I am currently experiencing an issue where the Firefox version of FireShot Pro begins capturing and never stops. Some details:

-- The problem occurs both when I select "Capture entire page" and "Capture visible part."

-- It doesn't seem to make a difference what type of web page I'm on.

-- There is no progress bar for the action. It only shows a red square with the text "Stop capturing."

-- The "Stop capturing" function doesn't seem to have any effect, though. The only way to stop the extension is to disable and re-enable it.

-- The problem does not occur with the Chrome extension - only the Firefox extension. In Firefox, it happens in both regular and incognito windows.

-- I'm using FireShot version 1.12.18 on a Windows 11 desktop computer. The Firefox version is 151.0b10 (64-bit).

-- To recreate the bug, I open Firefox, go to any webpage, and select "Capture entire page.." or Capture visible part..."

-- There is no specific URL to provide. The issue happens across the board, regardless of what site I'm trying to capture.

-- Below are messages that seem to appear when I try to use the FireShot extension in Firefox:

23:21:49.627 TypeError: can't access property "ownerGlobal", browser is null BrowserElementParent.sys.mjs:20:21

23:24:25.645 TypeError: e.hB.declarativeNetRequest.getMatchedRules is not a function background.js:2:1697617


Thank you very much for your help,
Mike
Pages: 1

 

 

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