You should post problem links "as is." Then note the problem.

https://finance.yahoo.com/echarts?s=SPY+Interactive#{%22allowChartStacking%22:true} is no problem for me.

Note that some charactors are not allowed in web addresses and are changed via %

@FredMcD I don't understand what you are trying to tell me. I've used FireFox for many years, and I only experienced this issue recently (~2 weeks ago) this link have been saved in my bookmarks for a long time, and now it won't return the page I expected from Yahoo. even if I save the same URL in bookmarks, the " becomes automatically %22.

the original URL should read: https://finance.yahoo.com/echarts?s=IBM+Interactive#{"showArea":false,"showLine":false,"showOhlc":true,"lineType":"bar","range":"5d","allowChartStacking":true}

link text

after, I bookmark it in Firefox 46.0 and even if I copy the correct URL from firefox and I paste it here, in this text box, it turns into this: https://finance.yahoo.com/echarts?s=IBM+Interactive#{%22showArea%22:false,%22showLine%22:false,%22showOhlc%22:true,%22lineType%22:%22bar%22,%22range%22:%225d%22,%22allowChartStacking%22:true}

ALL the " become %22

No problem here with the %20. If I paste this in the location field of a bookmark in directly in the location/address bar then Firefox shows the unescaped version and I get the page with the image.

• https://finance.yahoo.com/echarts?s=IBM+Interactive#{%22showArea%22:false,%22showLine%22:false,%22showOhlc%22:true,%22lineType%22:%22bar%22,%22range%22:%225d%22,%22allowChartStacking%22:true}

It is normal to encode characters like the double quote.

• https://developer.mozilla.org/Web/JavaScript/Reference/Global_Objects/encodeURI
• https://developer.mozilla.org/Web/JavaScript/Reference/Global_Objects/encodeURIComponent

You can open the Web Console ("3-bar" menu button or Tools > Web Developer).

• https://developer.mozilla.org/Tools/Web_Console

Paste the JavaScript code in the command line. Press the Enter key to evaluate the JavaScript code.

encodeURI('https://finance.yahoo.com/echarts?s=IBM+Interactive#{"showArea":false,"showLine":false,"showOhlc":true,"lineType":"bar","range":"5d","allowChartStacking":true}');

This gives:

https://finance.yahoo.com/echarts?s=IBM+Interactive#%7B%22showArea%22:false,%22showLine%22:false,%22showOhlc%22:true,%22lineType%22:%22bar%22,%22range%22:%225d%22,%22allowChartStacking%22:true%7D