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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Web Browsers’ Category

google chrome – How can I selectively disable paste blockers – Super User

Posted by jpluimers on 2021/04/16

For my link archive: [WayBack] google chrome – How can I selectively disable paste blockers – Super User.

Preliminary testing shows that Chrome Extension [] “Don’t Fuck with Paste” works with


Posted in Chrome, Chrome, Firefox, Google, Power User, Web Browsers | Leave a Comment »

Reminder: check if LUMC Privacy Statement and Gebruiksvoorwaarden are printable or downloadable as PDF.

Posted by jpluimers on 2021/02/26

Reminder to check out the results of this thread: [WayBack] Thread by @jpluimers: “Jammer dat het Privacy Statement op… als een pop-up zichtbaar is, waardoor je het niet volledig kunt afdrukk […]”.



Jammer dat het Privacy Statement op… als een pop-up zichtbaar is, waardoor je het niet volledig kunt afdrukken of als PDF opslaan.

Vreemd ook dat de tekst op anders is dan in de consent hierboven.

Kan @LUMC_Leiden dat oplossen?

Idem voor de Gebruiksvoorwaarden. Daar is geen alternatieve tekst van.
mentions In onderstaande code gaan de aanpassingen in beide <span>…</span> blokken zitten.


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Posted in Chrome, Development, LifeHacker, Power User, Software Development, Web Browsers, Web Development | Leave a Comment »

ColumnCopy – Chrome Web Store

Posted by jpluimers on 2021/02/19

[] ColumnCopy – Chrome Web Store: Enables copying columns from tables.

It can read anything on any web page, and it uses modifier keys, so I usually have it disabled until I need it.

You can disable/enable it on this page:


Via [WayBack] Select column from a table with Google Chrome – Super User

Sorry to dig up an old thread, but this might help someone in the future. I wrote a Chrome extension called ColumnCopy which accomplishes this task.


Posted in Chrome, LifeHacker, Power User, Web Browsers | Leave a Comment »

Deleting the WebCache database – The IE browser cache | Apttech’s Blog

Posted by jpluimers on 2021/02/15

[WayBack] Deleting the WebCache database – The IE browser cache | Apttech’s Blog quotes from WayBack: C drive space is using up on terminal server after upgrading to IE10 or IE11 – AsiaTech: Microsoft Azure & Development:

With the new cache implementation, the cache files are saved in %LocalAppData%\Microsoft\Windows\WebCache\ folder. And, the cache files will be created when a new user logs on.

Actually, the database is a file named WebCacheV01.dat in the cache folder, and its initial size could be around 20-32MB. The size of this file will keep increasing along with you browse more and more websites.

save the below contents into ClearIECache.cmd file and try to fun this file.

echo OFF
net stop COMSysApp
taskkill /F /IM dllhost.exe
taskkill /F /IM taskhost.exe
taskkill /F /IM taskhostex.exe
del /Q %LocalAppData%\Microsoft\Windows\WebCache\*.*
net start COMSysApp
echo ON

Furthermore, you’d better deploy the batch file to a logoff script of your local GPO, here are the steps.



Posted in Internet Explorer, Power User, Web Browsers, Windows, Windows 10 | Leave a Comment »

Still looking for base64url decoding tools, both on-line and for MacOS homebrew

Posted by jpluimers on 2021/02/11

Remember the screenshot on the right from yesterdays post Kristian Köhntopp explaining theories?

In the end, I:

  1. saved that tweet
  2. in
  3. then took the screenshot image from there (see below)
  4. cut out the grey parts, then posted the middle part

I much more would have used the screenshot functionality of Google as described here by Terence Eden:

[WayBack] twitter – How to convert a tweet to image – Stack Overflow

Google has a secret screenshot API

For example, you can use it to get a screenshot of a tweet like this

At the bottom of that JSON response, you’ll see

"screenshot": {
     "data": "_9j_4AAQSkZJRgAB.....=",
     "height": 569,
     "mime_type": "image/jpeg",
     "width": 320

You will need to Base64 decode it using the URL and Filename safe alphabet.

That will give you a JPG screenshot of the Tweet.

I was hoping for an on-line way, so I followed [WayBack] Google’s Secret Screenshot API – Terence Eden’s Blog.

The blog post pointed me to a Python based script ([WayBack] Python-Twitter-Hacks/ at master · edent/Python-Twitter-Hacks · GitHub) but had no online way.

So I tried out a few on-line things myself that failed:

Then I found out the script was just a proof of concept with hard coded URL and filename.

So I forked the repository, and fixed the script basing it on Python 3.

More on that next week.


  • [WayBack] RFC 4648 – The Base16, Base32, and Base64 Data Encodings: Base 64 Encoding with URL and Filename Safe Alphabet:
       The Base 64 encoding with an URL and filename safe alphabet has been
       used in [12].
       An alternative alphabet has been suggested that would use "~" as the
       63rd character.  Since the "~" character has special meaning in some
       file system environments, the encoding described in this section is
       recommended instead.
       This encoding may be referred to as "base64url".  This encoding
       should not be regarded as the same as the "base64" encoding and
       should not be referred to as only "base64". 
       This encoding is technically identical to the previous one, except
       for the 62:nd and 63:rd alphabet character, as indicated in Table 2.
             Table 2: The "URL and Filename safe" Base 64 Alphabet
         Value Encoding  Value Encoding  Value Encoding  Value Encoding
             0 A            17 R            34 i            51 z
             1 B            18 S            35 j            52 0
             2 C            19 T            36 k            53 1
             3 D            20 U            37 l            54 2
             4 E            21 V            38 m            55 3
             5 F            22 W            39 n            56 4
             6 G            23 X            40 o            57 5
             7 H            24 Y            41 p            58 6
             8 I            25 Z            42 q            59 7
             9 J            26 a            43 r            60 8
            10 K            27 b            44 s            61 9
            11 L            28 c            45 t            62 - (minus)
            12 M            29 d            46 u            63 _
            13 N            30 e            47 v           (underline)
            14 O            31 f            48 w
            15 P            32 g            49 x
            16 Q            33 h            50 y         (pad) =


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Posted in Apple, Development, Home brew / homebrew, Mac OS X / OS X / MacOS, Power User, Software Development, Web Browsers | Leave a Comment »

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