从原始帖子中删除FCI(完整配置信息)+ URL不太方便" ...
=>可能的FCI:
适用于FF v10.0.2'PE'，FF65，Win10/7的iMacros.

Not very "handy" to have removed your FCI (Full Config Info) + URL from your original Post...
=> Probable FCI:
iMacros for FF v10.0.2 'PE', FF65, Win10/7.

但是，是的，'CONTENT'参数应用于'INPUT'字段. "TAG"模式通常具有难点"，可处理的ajaxy"DIV"正像此站点一样在使用，而解决方法通常是使用"EVENT"模式:

But yep, the 'CONTENT' Parameter is meant to be used for 'INPUT' Fields. The 'TAG' Mode usually has "difficulties" working with editable ajaxy 'DIV''s like this Site apparently is using and the Workaround is usually to use the 'EVENT' Mode:

VERSION BUILD=8820413 RECORDER=FX
TAB T=1
URL GOTO=https://edubirdie.com/plagiarism-checker

'Title:
'EVENT TYPE=CLICK SELECTOR="HTML>BODY>DIV:nth-of-type(4)>DIV>SECTION>DIV>DIV>DIV>DIV:nth-of-type(3)>DIV" BUTTON=0
EVENTS TYPE=KEYPRESS SELECTOR="HTML>BODY>DIV:nth-of-type(4)>DIV>SECTION>DIV>DIV>DIV>DIV:nth-of-type(3)>DIV" CHARS="iMacros cannot insert content in to text field"

'Content:
'EVENT TYPE=CLICK SELECTOR="HTML>BODY>DIV:nth-of-type(4)>DIV>SECTION>DIV>DIV>DIV>DIV:nth-of-type(4)>DIV>DIV" BUTTON=0
EVENTS TYPE=KEYPRESS SELECTOR="HTML>BODY>DIV:nth-of-type(4)>DIV>SECTION>DIV>DIV>DIV>DIV:nth-of-type(4)>DIV>DIV" CHARS="I want to input data from csv to form on website through iMacros."
EVENTS TYPE=KEYPRESS SELECTOR="HTML>BODY>DIV:nth-of-type(4)>DIV>SECTION>DIV>DIV>DIV>DIV:nth-of-type(4)>DIV>DIV" KEYS="[13,13]"
EVENTS TYPE=KEYPRESS SELECTOR="HTML>BODY>DIV:nth-of-type(4)>DIV>SECTION>DIV>DIV>DIV>DIV:nth-of-type(4)>DIV>DIV" CHARS="While recording iMacros, I got this code"
EVENT TYPE=KEYPRESS SELECTOR="HTML>BODY>DIV:nth-of-type(4)>DIV>SECTION>DIV>DIV>DIV>DIV:nth-of-type(4)>DIV>DIV" KEY=13

(在iMacros上针对FF v8.8.2，Pale Moon v26.3.3(= FF47)，Win10_x64进行了测试.)

(Tested on iMacros for FF v8.8.2, Pale Moon v26.3.3 (=FF47), Win10_x64.)

但是...！，您的FF(免费"/"PE")版本的v10.0.2不支持(不再)活动"模式.您可能需要切换到Chrome，其中CR的v10.0.5支持该模式，或者要返回"适用于FF的v8.9.7(适用于FF v55.0.3或PM27/28).

BUT...!, the 'EVENT' Mode is not supported (anymore) in your v10.0.2 for FF ('Free'/'PE') Version. You would need to switch to Chrome where v10.0.5 for CR supports that Mode, or to "go back" to v8.9.7 for FF which works on FF v55.0.3 or PM27/28.